List of world heavyweight boxing champions

Current world heavyweight champion
Current WBA (Super), WBC, IBF, IBO, TBRB and The Ring heavyweight champion Oleksandr Usyk

At boxing's beginning, the heavyweight division had no weight limit, and historically the weight class has gone with vague or no definition. During the 19th century many heavyweights were 170 pounds (12 st 2 lb, 77 kg) or less, though others weighed considerably more. John L. Sullivan was the first widely recognized champion under Marquess of Queensberry rules. Known as the "Boston Strong Boy", Sullivan weighed around 200 pounds when in shape, and helped transition the sport from its bare-knuckle era. Sullivan would be defeated for the title by "Gentleman" Jim Corbett over 21 rounds on September 7, 1892, the first heavyweight titleholder solely under Queensberry rules.

In 1920, a de facto minimum weight for a heavyweight was set at 175 pounds (12 st 7 lb, 79 kg) with the standardization of a weight limit for the light heavyweight division. The addition of the cruiserweight division, which began in 1979, reset the de facto minimum, first to 190 pounds and then to 200 pounds in 2004 when boxing's major sanctioning bodies universally raised the weight limit at which they would recognize champions. In November 2020, the World Boxing Council created a new division called bridgerweight for boxers weighing between 200 and 224 pounds, and in December 2023, the World Boxing Association followed suit. As of March 2025, no other major body has recognized the division.

The championship of the heavyweight division has been fractured or disputed at various times in its history. Until the 1960s, such disputes were settled in the ring, typically with alternate title claimants largely being forgotten. The rise of sanctioning organizations, however, have produced an environment where typically there is no single world heavyweight champion, with titleholders recognized by one of these organizations (a "World Champion") or more (a "Super Champion", a "Unified Champion", or, in the rare cases where the four most prominent organizations recognize the same boxer, an "Undisputed Champion").

Some title reigns are considered dubious owing to long periods of inactivity, the legitimacy of the organization granting championship recognition, and other factors. In 1967, for example, Muhammad Ali was denied a boxing license in every U.S. jurisdiction and stripped of his passport because of his refusal to be inducted into the armed forces. On April 29, 1967, his recognition as champion by both the World Boxing Association and World Boxing Council was withdrawn. Yet Ali remained the lineal champion and was recognized by The Ring and most boxing purists until his defeat in 1971. In pursuit of greater revenues, some organizations have now adopted a practice of simultaneously recognizing multiple champions in a weight division, creating a situation in which a champion may be unable not only to secure recognition from multiple sanctioning bodies but to secure sole recognition from a single one.

Championship recognition

All heavyweight champions

Public acclamation: 1884 to 1921

World champions were initially recognized by wide public acclamation, with heavyweight champions winning and losing championship recognition solely in the ring. Retirements periodically resulted in no one, true champion being recognized, while in other cases new champions were proclaimed only to see a previously recognized champion come out of retirement. Public interest in boxing resulted in a true champion being determined by means of title claimants facing one another in the ring, with the winner being recognized as world champion.

Currently, International Boxing Hall of Fame recognizes these world heavyweight title lineages from this period:[a]

Date startedFirst championDate endedLast champion
1August 29, 1885John L. SullivanMay 15, 1905James J. Jeffries
2July 3, 1905Marvin HartSeptember 23, 1926Jack Dempsey

The Ring magazine: 1922 to present

The Ring has recognized heavyweight champions during two periods, commencing with its inaugural issue in 1922 and continuing until the 1990s, then again from 2002 to the present day. Under its original policy, a champion earned championship recognition in the ring, defeating the preceding champion or winning a bout between its top rated contenders. Once awarded, championship recognition could be lost only by death, retirement, or loss in the ring. In 2012, this policy was revised so championship recognition could be more easily awarded or withdrawn.[10]

Sanctioning bodies: 1921 to present

The National Boxing Association (NBA) was organized in 1921 to serve as a regulating authority for boxing in the United States. The prominence of New York City as the epicenter of boxing would lead to its state boxing regulatory body, the New York State Athletic Commission (NYSAC) joining the NBA in recognizing world champions in each weight class. A third entity, the European Boxing Union (IBU) would follow suit, but with limited exception in the heavyweight division the three organizations recognized the same champion.

At its 1962 convention, the NBA's non-United States members exploited a membership rule and took effective control of the organization, rebranding it as the World Boxing Association. The now WBA would be joined the following year by a combination of state and national boxing commissions (including the NYSAC and IBU) to form a new organization, the World Boxing Council (WBC). In time, each organization would have its own spin-off sanctioning organization break from its ranks: the United States Boxing Association, which disassociated with the WBA in the late 1970s and became the International Boxing Federation in 1983, and the World Boxing Organization, whose members would split from the WBC in 1988. Today there are over a dozen sanctioning organizations which recognize champions and sanction world championship bouts, but the WBA, WBC, IBF, and WBO are recognized by the International Boxing Hall Of Fame as major sanctioning bodies.

Current status of championships

OrganizationRecognitionChampionDate wonStatus of next defense
WBASuper world championOleksandr Usyk(def. Anthony Joshua)September 25, 2021tbd
WBCWorld championOleksandr Usyk(def. Tyson Fury)May 18, 2024tbd
IBFWorld championOleksander Usyk(def. Daniel Dubois)July 19, 2025tbd
WBOWorld championFabio Wardley(interim champion promoted)November 17, 2025tbd

List of champions

No. Champion Recognition Begin reign End reign Day(s) Title defense(s) Additional recognition Note(s) Source(s)
1 John L. Sullivandef. Dominick McCaffreyWorldAugust 29, 1885September 7, 1892 2,566 25,4[11]
2 James J. CorbettWorldSeptember 7, 1892March 17, 1897 1,652 def. Charley Mitchell on January 25, 18945[12]
3 Bob FitzsimmonsWorldMarch 17, 1897June 9, 1899 814 [13]
4 James J. JeffriesWorldJune 9, 1899May 15, 1905 2,166 def. Tom Sharkey on November 3, 1899def. John Finnegan on April 6, 1900def. James J. Corbett on May 11, 1900def. Gus Ruhlin on November 15, 1901def. Bob Fitzsimmons on July 25, 1902def. James J. Corbett on August 14, 1903def. Jack Munroe on August 26, 19042,6[14]
5 Marvin Hartdef. Jack RootWorldJuly 3, 1905February 23, 1906 235 1[15]
6 Tommy BurnsWorldFebruary 23, 1906December 26, 1908 1,037 def. James J. Walker on March 28, 1906def. Jim O'Brien on March 28, 1906def. Fireman Jim Flynn on October 2, 1906draw vs. Philadelphia Jack O'Brien on November 28, 1906def. Philadelphia Jack O'Brien on May 8, 1907def. Bill Squires on July 4, 1907def. Gunner Moir on December 2, 1907def. Jack Palmer on February 10, 1908def. Jem Roche on March 17, 1908def. Jewey Smith on April 18, 1908def. Bill Squires on June 13, 1908def. Bill Squires on August 24, 1908def. Bill Lang on September 3, 1908[16]
7 Jack JohnsonWorldDecember 26, 1908April 5, 1915 2,291 draw vs. Philadelphia Jack O'Brien on May 19, 1909def. Al Kaufman on September 9, 1909def. Stanley Ketchel on October 16, 1909def. James J. Jeffries on July 4, 1910def. Fireman Jim Flynn on July 4, 1912draw vs. Battling Jim Johnson on December 19, 1913def. Frank Moran on June 27, 19147[17]
8 Jess WillardWorldApril 5, 1915July 4, 1919 1,551 def. Frank Moran on March 25, 1916[18]
9 Jack DempseyWorldJuly 4, 1919July 2, 1921 729def. Billy Miske on September 6, 1920def. Bill Brennan on December 14, 1920def. Georges Carpentier on July 2, 1921The Ringawarded the title in 1922[19]
NBAJuly 2, 1921July 24, 1922 387[19]
NBA, and NYSACJuly 24, 1922September 23, 1926 1,522def. Tommy Gibbons on July 4, 1923def. Luis Angel Firpo on September 14, 1923[19]
10 Gene TunneyNBA, and NYSACSeptember 23, 1926July 31, 1928 677def. Jack Dempsey on September 22, 1927def. Tom Heeney on July 26, 1928The Ring2[20]
11 Max Schmelingdef. Jack SharkeyNBA, and NYSACJune 12, 1930January 7, 1931 209The Ring1,8[21]
NBA, and IBUJanuary 7, 1931June 21, 1932 531def. Young Stribling on July 3, 19311,10[21]
12 Jack SharkeyNBA, NYSAC, and IBUJune 21, 1932June 29, 1933 373The Ring[22]
13 Primo CarneraNBA, NYSAC, and IBUJune 29, 1933June 14, 1934 350def. Paulino Uzcudun on October 22, 1933def. Tommy Loughran on March 1, 1934The Ring1,10[23]
14 Max BaerNBA, NYSAC, and IBUJune 14, 1934June 13, 1935 364The Ring9[24]
15 James J. BraddockNBA, NYSAC, and IBUJune 13, 1935June 22, 1937 740The Ring[25]
16 Joe LouisNBA, NYSAC, and IBUJune 22, 1937March 1, 1949 4,270def. Tommy Farr on August 30, 1937def. Nathan Mann on February 23, 1938def. Harry Thomas on April 4, 1938def. Max Schmeling on June 22, 1938def. John Henry Lewis on January 25, 1939def. Jack Roper on April 17, 1939def. Tony Galento on June 28, 1939def. Bob Pastor on September 20, 1939def. Arturo Godoy on February 9, 1940def. Johnny Paychek on March 29, 1940def. Arturo Godoy on June 20, 1940def. Al McCoy on December 16, 1940def. Red Burman on January 31, 1941def. Gus Dorazio on February 17, 1941def. Abe Simon on March 21, 1941def. Tony Musto on April 8, 1941def. Buddy Baer on May 23, 1941def. Billy Conn on June 18, 1941def. Lou Nova on September 29, 1941def. Buddy Baer on January 9, 1942def. Abe Simon on March 27, 1942def. Johnny Davis on November 14, 1944def. Billy Conn on June 19, 1946def. Tami Mauriello on September 18, 1946def. Jersey Joe Walcott on December 5, 1947def. Jersey Joe Walcott on June 25, 1948The Ring2[26][27]
17 Ezzard Charlesdef. Jersey Joe WalcottNBAJune 22, 1949September 27, 1950 462def. Gus Lesnevich on August 10, 1949def. Pat Valentino on October 14, 1949def. Freddie Beshore on August 15, 1950def. Joe Louis on September 27, 1950The Ring1,10[28]
NBA, and NYSACSeptember 27, 1950June 16, 1951 261def. Nick Barone on December 5, 1950def. Lee Oma on January 12, 1951def. Jersey Joe Walcott on March 7, 1951def. Joey Maxim on May 30, 19511,10[28]
NBA, NYSAC, and IBUJune 16, 1951July 18, 1951 33[28]
18 Jersey Joe WalcottNBA, and NYSACJuly 18, 1951September 23, 1952 433def. Ezzard Charles on June 5, 1952The Ring[29]
19 Rocky MarcianoNBA, and NYSACSeptember 23, 1952April 27, 1956 1,312def. Jersey Joe Walcott on March 15, 1953def. Roland LaStarza on September 24, 1953def. Ezzard Charles on June 17, 1954def. Ezzard Charles on September 17, 1954def. Don Cockell on May 16, 1955def. Archie Moore on September 21, 1955The Ring2[30]
20 Floyd Pattersondef. Archie MooreNBA, and NYSACNovember 30, 1956June 26, 1959 938def. Tommy Jackson on July 29, 1957def. Pete Rademacher on August 22, 1957def. Roy Harris on August 18, 1958def. Brian London on May 1, 1959The Ring1,11[31]
21 Ingemar JohanssonNBA, and NYSACJune 26, 1959June 20, 1960 360The Ring[32]
22 Floyd Patterson (Second reign)NBA, and NYSACJune 20, 1960September 25, 1962 827def. Ingemar Johansson on March 13, 1961def. Tom McNeeley on December 4, 1961The Ring[31]
23 Sonny ListonNYSAC, and WBASeptember 25, 1962July 22, 1963 270def. Floyd Patterson on July 22, 1963The Ring[33]
NYSAC, WBA, and WBCJuly 22, 1963February 25, 1964 248[33]
24 Muhammad AliNYSAC, WBA, and WBCFebruary 25, 1964June 19, 1964 115The Ring12[34]
NYSAC, and WBCJune 19, 1964February 6, 1967 962def. Sonny Liston on May 25, 1965def. Floyd Patterson on November 22, 1965def. George Chuvalo on March 29, 1966def. Henry Cooper on May 21, 1966def. Brian London on August 6, 1966def. Karl Mildenberger on September 10, 1966def. Cleveland Williams on November 14, 1966def. Ernie Terrell on February 6, 1967[34]
NYSAC, WBA, and WBCFebruary 6, 1967April 29, 1967 82def. Zora Folley on March 22, 196713[34]
25 Ernie Terrelldef. Eddie MachenWBAMarch 5, 1965February 6, 1967 703def. George Chuvalo on November 1, 1965def. Doug Jones on June 28, 19661[35]
26 Joe Frazierdef. Buster MathisNYSACMarch 4, 1968February 16, 1970 714def. Manuel Ramos on June 24, 1968def. Oscar Bonavena on December 10, 1968def. Dave Zyglewicz on April 22, 1969def. Jerry Quarry on June 23, 1969def. Jimmy Ellis on February 16, 1970The Ringdef. Muhammad Ali on March 8, 19711[36]
WBA, and WBCFebruary 16, 1970January 22, 1973 1,071def. Bob Foster on November 18, 1970def. Muhammad Ali on March 8, 1971def. Terry Daniels on January 15, 1972def. Ron Stander on May 25, 197215[36]
27 Jimmy Ellisdef. Jerry QuarryWBAApril 27, 1968February 16, 1970 660def. Floyd Patterson on September 14, 19681,14[37]
28 George ForemanWBA, and WBCJanuary 22, 1973October 30, 1974 646def. José Roman on September 1, 1973def. Ken Norton on March 26, 1974The Ring1,10[38]
29 Muhammad Ali (Second reign)WBA, and WBCOctober 30, 1974February 15, 1978 1,204def. Chuck Wepner on March 24, 1975def. Ron Lyle on May 16, 1975def. Joe Bugner on June 30, 1975def. Joe Frazier on October 1, 1975def. Jean-Pierre Coopman on February 20, 1976def. Jimmy Young on April 30, 1976def. Richard Dunn on May 24, 1976def. Ken Norton on September 28, 1976def. Alfredo Evangelista on May 16, 1977def. Earnie Shavers on September 29, 1977The Ring[34]
30 Leon SpinksWBA, and WBCFebruary 15, 1978March 18, 1978 31The Ring3[39]
WBAMarch 18, 1978September 15, 1978 181[39]
31 Ken Nortonawarded the titleWBCMarch 18, 1978June 9, 1978 8316[40]
32 Larry HolmesWBCJune 9, 1978December 11, 1983 2,011def. Alfredo Evangelista on November 10, 1978def. Ossie Ocasio on March 23, 1979def. Mike Weaver on June 22, 1979def. Earnie Shavers on September 28, 1979def. Lorenzo Zanon on February 3, 1980def. Leroy Jones on March 31, 1980def. Scott LeDoux on July 7, 1980def. Muhammad Ali on October 2, 1980def. Trevor Berbick on April 11, 1981def. Leon Spinks on June 12, 1981def. Renaldo Snipes on November 6, 1981def. Gerry Cooney on June 11, 1982def. Randall "Tex" Cobb on November 26, 1982def. Lucien Rodriguez on March 27, 1983def. Tim Witherspoon on May 20, 1983def. Scott Frank on September 10, 1983The Ringdef. Muhammad Ali on October 2, 19802[41]
IBFDecember 11, 1983September 21, 1985 650def. James Smith on November 9, 1984def. David Bey on March 15, 1985def. Carl Williams on May 20, 198517[41]
33 Muhammad Ali (Third reign)WBASeptember 15, 1978October 18, 1979 398The Ring2[34]
34 John Tatedef. Gerrie CoetzeeWBAOctober 20, 1979March 31, 1980 1631[42]
35 Mike WeaverWBAMarch 31, 1980December 10, 1982 984def. Gerrie Coetzee on October 25, 1980def. James Tillis on October 3, 1981[43]
36 Michael DokesWBADecember 10, 1982September 23, 1983 287draw vs. Mike Weaver on May 20, 1983[44]
37 Gerrie CoetzeeWBASeptember 23, 1983December 1, 1984 435[45]
38 Tim Witherspoondef. Greg PageWBCMarch 9, 1984August 31, 1984 1751[46]
39 Pinklon ThomasWBCAugust 31, 1984March 22, 1986 568def. Mike Weaver on June 15, 1985[47]
40 Greg PageWBADecember 1, 1984April 29, 1985 149[48]
41 Tony TubbsWBAApril 29, 1985January 17, 1986 263[49]
42 Michael SpinksIBFSeptember 21, 1985February 26, 1987 523def. Larry Holmes on April 19, 1986def. Steffen Tangstad on September 6, 1986The Ring3[50]
43 Tim Witherspoon (Second reign)WBAJanuary 17, 1986December 12, 1986 329def. Frank Bruno on July 19, 1986[46]
44 Trevor BerbickWBCMarch 22, 1986November 22, 1986 245[51]
45 Mike TysonWBCNovember 22, 1986March 7, 1987 105def. James Smith on March 7, 1987The Ringdef. Michael Spinks on June 27, 1988[52]
WBA, and WBCMarch 7, 1987August 1, 1987 147def. Pinklon Thomas on May 30, 1987def. Tony Tucker on August 1, 1987[52]
WBA, WBC, and IBFAugust 1, 1987February 11, 1990 925def. Tyrell Biggs on October 16, 1987def. Larry Holmes on January 22, 1988def. Tony Tubbs on March 21, 1988def. Michael Spinks on June 27, 1988def. Frank Bruno on February 25, 1989def. Carl Williams on July 21, 1989[52]
46 James "Bonecrusher" SmithWBADecember 12, 1986March 7, 1987 85[53]
47 Tony Tuckerdef. Buster DouglasIBFMay 30, 1987August 1, 1987 641[54]
48 Francesco Damianidef. Johnny du PlooyWBOMay 6, 1989January 11, 1991 616def. Daniel Eduardo Neto on December 16, 19891[55]
49 James "Buster" DouglasWBA, WBC, and IBFFebruary 11, 1990October 25, 1990 257[56]
50 Evander HolyfieldWBA, WBC, and IBFOctober 25, 1990November 13, 1992 751def. George Foreman on April 19, 1991def. Bert Cooper on November 23, 1991def. Larry Holmes on June 19, 1992[57]
51 Ray MercerWBOJanuary 11, 1991December 24, 1991 348def. Tommy Morrison on October 18, 19913[58]
52 Michael Moorerdef. Bert CooperWBOMay 15, 1992February 3, 1993 2651,2[59]
53 Riddick BoweWBA, WBC, and IBFNovember 13, 1992December 14, 1992 322[60]
WBA, and IBFDecember 14, 1992November 6, 1993 328def. Michael Dokes on February 6, 1993def. Jesse Ferguson on May 22, 1993[60]
54 Lennox Lewisawarded the titleWBCDecember 14, 1992September 24, 1994 650def. Tony Tucker on May 8, 1993def. Frank Bruno on October 1, 1993def. Phil Jackson on May 6, 199418[61]
55 Tommy Morrisondef. George ForemanWBOJune 7, 1993October 29, 1993 145def. Tim Tomashek on August 30, 19931[62]
56 Michael BenttWBOOctober 29, 1993March 19, 1994 142[63]
57 Evander Holyfield (Second reign)WBA, and IBFNovember 6, 1993April 22, 1994 168[57]
58 Herbie HideWBOMarch 19, 1994March 11, 1995 358[64]
59 Michael Moorer (Second reign)WBA, and IBFApril 22, 1994November 5, 1994 198[59]
60 Oliver McCallWBCSeptember 24, 1994September 2, 1995 344def. Larry Holmes on April 8, 1995[65]
61 George Foreman (Second reign)WBA, and IBFNovember 5, 1994March 4, 1995 1193[38]
IBFMarch 4, 1995June 29, 1995 117def. Axel Schulz on April 22, 19952[38]
62 Riddick Bowe (Second reign)WBOMarch 11, 1995May 1, 1996 418def. Jorge Luis Gonzalez on June 17, 19953[60]
63 Bruce Seldondef. Tony TuckerWBAApril 8, 1995September 7, 1996 519def. Joe Hipp on August 19, 19951[66]
64 Frank BrunoWBCSeptember 2, 1995March 16, 1996 197[67]
65 Mike Tyson (Second reign)WBCMarch 16, 1996September 7, 1996 175[52]
WBA, and WBCSeptember 7, 1996September 24, 1996 172[52]
WBASeptember 24, 1996November 9, 1996 46[52]
66 Michael Moorer (Third reign)def. Axel SchulzIBFJune 22, 1996November 8, 1997 505def. Francois Botha on November 9, 1996def. Vaughn Bean on March 29, 19971,19[59]
67 Henry Akinwandedef. Jeremy WilliamsWBOJune 29, 1996February 17, 1997 234def. Alexander Zolkin on November 9, 1996def. Scott Welch on January 11, 19971,2[68]
68 Evander Holyfield (Third reign)WBANovember 9, 1996November 8, 1997 365def. Mike Tyson on June 28, 1997def. Michael Moorer on November 8, 1997[57]
WBA, and IBFNovember 8, 1997November 13, 1999 736def. Vaughn Bean on September 19, 1998draw vs. Lennox Lewis on March 13, 1999[57]
69 Lennox Lewis (Second reign)def. Oliver McCallWBCFebruary 7, 1997November 13, 1999 1010def. Henry Akinwande on July 12, 1997def. Andrzej Golota on October 4, 1997def. Shannon Briggs on March 28, 1998def. Željko Mavrović on September 26, 1998draw vs. Evander Holyfield on March 13, 1999def. Evander Holyfield on November 13, 19991[61]
WBA, WBC, and IBFNovember 13, 1999April 29, 2000 1683[61]
WBC, and IBFApril 29, 2000April 22, 2001 358def. Michael Grant on April 29, 2000def. Francois Botha on July 15, 2000def. David Tua on November 11, 2000[61]
70 Herbie Hide (Second reign)def. Tony TuckerWBOJune 28, 1997June 26, 1999 729def. Damon Reed on April 18, 1998def. Wilhelm Fischer on September 26, 19981[64]
71 Vitali KlitschkoWBOJune 26, 1999April 1, 2000 281def. Ed Mahone on October 9, 1999def. Obed Sullivan on December 11, 1999[69]
72 Chris ByrdWBOApril 1, 2000October 14, 2000 197[70]
73 Evander Holyfield (Fourth reign)def. John RuizWBAAugust 12, 2000March 3, 2001 2041[57]
74 Wladimir KlitschkoWBOOctober 14, 2000March 8, 2003 876def. Derrick Jefferson on March 24, 2001def. Charles Shufford on August 4, 2001def. Francois Botha on March 16, 2002def. Ray Mercer on June 29, 2002def. Jameel McCline on December 7, 2002[71]
75 John RuizWBAMarch 3, 2001March 1, 2003 729draw vs. Evander Holyfield on December 15, 2001def. Kirk Johnson on July 27, 2002[72]
76 Hasim RahmanWBC, and IBFApril 22, 2001November 17, 2001 210[73]
77 Lennox Lewis (Third reign)WBC, and IBFNovember 17, 2001September 5, 2002 293def. Mike Tyson on June 8, 2002The Ringawarded the title in 20022[61]
WBCSeptember 5, 2002February 6, 2004 519def. Vitali Klitschko on June 21, 20032[61]
78 Chris Byrd (Second reign)def. Evander HolyfieldIBFDecember 14, 20021,591def. Fres Oquendo on September 20, 2003draw vs. Andrzej Golota on April 17, 2004def. Jameel McCline on November 13, 2004def. DaVarryl Williamson on October 1, 20051[70]
79 Roy Jones Jr.WBAMarch 1, 2003February 20, 2004 3572[74]
80 Corrie SandersWBOMarch 8, 2003October 9, 2003 2162[75]
81 John Ruiz (Second reign)def.Hasim Rahman for interim titleWBAFebruary 20, 2004December 17, 2005 667def. Fres Oquendo on April 17, 2004def. Andrzej Golota on November 13, 200420[72]
82 Lamon Brewsterdef. Wladimir KlitschkoWBOApril 10, 2004April 1, 2006 722def. Kali Meehan on September 4, 2004def. Andrzej Golota on May 21, 2005def. Luan Krasniqi on September 28, 20051[76]
83 Vitali Klitschko (Second reign)def. Corrie SandersWBCApril 24, 2004November 9, 2005 565def. Danny Williams on December 11, 2004The Ring1,2[69]
84 Hasim Rahman (Second reign)def. Monte Barrett for interim titleWBCNovember 9, 2005August 12, 2006 277draw vs. James Toney on March 18, 200621[73]
85 Nikolai ValuevWBADecember 17, 2005April 14, 2007 484def. Owen Beck on June 3, 2006def. Monte Barrett on October 7, 2006def. Jameel McCline on January 20, 20071,10[77]
86 Siarhei LiakhovichWBOApril 1, 2006November 4, 2006 218[78]
87 Wladimir Klitschko (Second reign)IBFApril 22, 2006February 23, 2008 673def. Calvin Brock on November 11, 2006def. Ray Austin on March 10, 2007def. Lamon Brewster on July 7, 2007def. Sultan Ibragimov on February 23, 2008The Ringdef. Ruslan Chagaev on June 20, 2009[71]
IBF, and WBOFebruary 23, 2008July 2, 2011 1,226def. Tony Thompson on July 12, 2008def. Hasim Rahman on December 13, 2008def. Ruslan Chagaev on June 20, 2009def. Eddie Chambers on March 20, 2010def. Samuel Peter on September 11, 2010def. David Haye on July 2, 2011[71]
WBA (Super), IBF, and WBOJuly 2, 2011November 28, 2015 1,611def. Jean-Marc Mormeck on March 13, 2012def. Tony Thompson on July 7, 2012def. Mariusz Wach on November 10, 2012def. Francesco Pianeta on May 4, 2013def. Alexander Povetkin on October 5, 2013def. Alex Leapai on April 26, 2014def. Kubrat Pulev on November 15, 2014def. Bryant Jennings on April 25, 2015[71]
88 Oleg MaskaevWBCAugust 12, 2006December 9, 2006 120[79][80]
December 9, 2006March 8, 2008 456def. Okello Peter on December 10, 2006
89 Shannon BriggsWBONovember 4, 2006June 2, 2007 211[81]
90 Ruslan ChagaevWBAApril 14, 2007July 3, 2008 799def. Matt Skelton on January 19, 200822[82]
91 Sultan IbragimovWBOJune 2, 2007February 23, 2008 267def. Evander Holyfield on October 13, 2007[83]
92 Samuel PeterWBCMarch 8, 2008October 11, 2008 218[84]
93 Nikolai Valuev (Second reign)def. John RuizWBAAugust 30, 2008November 7, 2009 435def. Evander Holyfield on December 20, 20081,22[77]
94 Vitali Klitschko (Third reign)WBCOctober 11, 2008December 15, 2013 1,892def. Juan Carlos Gomez on March 21, 2009def. Chris Arreola on September 26, 2009def. Kevin Johnson on December 12, 2009def. Albert Sosnowski on May 29, 2010def. Shannon Briggs on October 16, 2010def. Odlanier Solís on March 19, 2011def. Tomasz Adamek on September 10, 2011def. Derek Chisora on February 18, 2012def. Mahmoud Charr on September 8, 20122[69]
95 David HayeWBANovember 7, 2009July 2, 2011 603def. John Ruiz on April 3, 2010def. Audley Harrison on November 13, 2010[85]
Alexander Povetkindef. Ruslan ChagaevWBA (Regular)August 27, 2011October 5, 2013 771def. Cedric Boswell on December 3, 2011def. Marco Huck on February 25, 2012def. Hasim Rahman on September 29, 2012def. Andrzej Wawrzyk on May 17, 20131,23[86]
96 Bermane Stivernedef. Chris ArreolaWBCMay 10, 2014January 17, 2015 2531[87]
Ruslan Chagaevdef. Fres OquendoWBA (Regular)July 6, 2014March 5, 2016 609def. Francesco Pianeta on July 11, 20151[82]
97 Deontay WilderWBCJanuary 17, 2015February 22, 2020 1,863def. Eric Molina on June 13, 2015def. Johann Duhaupas on September 26, 2015def. Artur Szpilka on January 16, 2016def. Chris Arreola on July 16, 2016def. Gerald Washington on February 25, 2017def. Bermane Stiverne on November 4, 2017def. Luis Ortiz on March 3, 2018draw vs. Tyson Fury on December 1, 2018def. Dominic Breazeale on May 18, 2019def. Luis Ortiz on November 23, 2019[88]
98 Tyson FuryWBA (Super), IBF, and WBONovember 28, 2015December 8, 2015 11The Ring3[89]
WBA (Super), and WBODecember 8, 2015October 12, 2016 3102[89]
99 Charles Martindef. Vyacheslav GlazkovIBFJanuary 16, 2016April 9, 2016 851[90]
Lucas BrowneWBA (Regular)March 5, 2016May 12, 2016 6924[91]
100 Anthony JoshuaIBFApril 9, 2016April 29, 2017 386def. Dominic Breazeale on June 25, 2016def. Eric Molina on December 10, 2016def. Wladimir Klitschko on April 29, 2017[92]
WBA (Super), and IBFApril 29, 2017March 31, 2018 337def. Carlos Takam on October 28, 2017def. Joseph Parker on March 31, 20181[92]
WBA (Super), IBF, WBOMarch 31, 2018June 1, 2019 428def. Alexander Povetkin on September 22, 2018[92]
Ruslan Chagaevawarded the titleWBA (Regular)May 12, 2016July 25, 2016 753[82]
101 Joseph Parkerdef. Andy Ruiz Jr.WBODecember 10, 2016March 31, 2018 477def. Răzvan Cojanu on May 6, 2017def. Hughie Fury on September 23, 20171[93]
Mahmoud Charrdef. Alexander UstinovWBA (Regular)November 25, 2017January 29, 2021 1,1621[94]
102 Andy Ruiz Jr.WBA (Super), IBF, WBOJune 1, 2019December 7, 2019 190[95]
103 Anthony Joshua (Second reign)WBA (Super), IBF, WBODecember 7, 2019September 25, 2021 659def. Kubrat Pulev on December 12, 2020[92]
104 Tyson Fury (Second reign)WBCFebruary 22, 2020May 18, 2024 1,548def. Deontay Wilder on October 9, 2021def. Dillian Whyte on April 23, 2022def. Derek Chisora on December 3, 2022The Ring[89]
Trevor Bryandef. Bermane StiverneWBA (Regular)January 29, 2021June 11, 2022 498def. Jonathan Guidry on January 29, 20221,26[96]
105 Oleksandr UsykWBA (Super), IBF, WBOSeptember 25, 2021May 18, 2024 967def. Anthony Joshua on August 20, 2022def. Daniel Dubois on August 26, 2023def. Tyson Fury on May 18, 2024The Ringdef. Anthony Joshua on August 20, 2022[97][98]
WBA (Super), WBC, IBF, WBOMay 18, 2024June 25, 2024 38
WBA (Super), WBC, WBOJune 25, 2024July 19, 2025 389def. Tyson Fury on December 21, 2024def. Daniel Dubois on July 19, 2025
WBA (Super), WBC, IBF, WBOJuly 19, 2025November 17, 2025 121
WBA (Super), WBC, IBFNovember 17, 2025present 78
Daniel DuboisWBA (Regular)June 11, 2022August 26, 2023 441def. Kevin Lerena on December 3, 2022[99]
Mahmoud CharrReinstated by legal appealWBA (Regular)August 31, 2023December 7, 2024 886[100]
106 Daniel Duboisinterim champion promotedIBFJune 26, 2024July 19, 2025 388def. Anthony Joshua on September 21, 2024[98]
Kubrat PulevWBA (Regular)December 7, 2024December 12, 2025 370[101]
107 Fabio Wardleyinterim champion promotedWBONovember 17, 2025present 78[102]
Murat GassievWBA (Regular)December 12, 2025present 53[103]

Footnotes

  1. Won vacant championship title.
  2. Voluntarily relinquished championship title.
  3. Championship recognition withdrawn by sanctioning organization upon his refusal to fight an opponent of the organization's designation
  4. In 1882, Sullivan defeated Paddy Ryan to win the bare-knuckle championship of America. A lack of legitimate challengers elsewhere gradually resulted in Sullivan earning worldwide recognition. On August 29, 1885, he defeated Dominick McCaffrey in a bout described as "the Marquess of Queensberry glove contest for the championship of the world."
  5. Corbett announced his retirement from boxing in 1895, nominating Steve O'Donnell as his successor. As tradition demanded the title be won in the ring, O'Donnell was matched against Peter Maher on November 11, 1895, at Maspeth, New York. Maher won via first-round knockout, but the public generally didn't accept Maher and Maher himself expressed a desire to fight Corbett for the "real" title. In Maher's next bout, Bob Fitzsimmons defeated him via first-round knockout on February 21, 1896. Fitzsimmons in turn was defeated by Tom Sharkey of Dundalk on December 2, 1896, in a contest billed as for the heavyweight title. Corbett announced his return to the ring shortly thereafter, at which time the championship claims of Maher, Fitzsimmons, and Sharkey were for the most part dismissed. Sharkey's title claims lapsed when he was defeated by Jeffries in May 1898.
  6. Jeffries announced his retirement, relinquishing the title and promoting a match between Marvin Hart and Jack Root for the championship. Jeffries returned to the ring to challenge Jack Johnson.
  7. The British National Sporting Club withdrew its recognition of Johnson as champion when he refused to defend his title against the British champion William "Iron" Hague. The NSC matched Hague with Canadian Sam Langford for its title on May 24, 1909. Langford won via fourth-round knockout but never pursued a championship claim.
  8. Schmeling earned championship recognition by defeating Jack Sharkey by controversial disqualification. The New York State Athletic Commission withdrew its recognition of Schmeling when he refused to grant Sharkey an immediate rematch. The NYSAC did not recognize a champion until Sharkey defeated Schmeling in 1932.
  9. In late 1934, the International Boxing Union (IBU) ordered Baer to defend his title against European champion Pierre Charles of Belgium. When Baer refused, the IBU sanctioned a bout between Charles and American George Godfrey for their title on October 2, 1935. Godfrey won via fifteen-round decision but never pursued a championship claim. The IBU ultimately recognized Baer's successor James J. Braddock as champion.
  10. Two months after Louis' retirement announcement, the International Boxing Union sanctioned a bout between British champion Bruce Woodcock and American Lee Savold for its version of the title. The bout was not staged until June 1950, however, due to delays caused by injuries suffered by Woodcock in an automobile accident. Meanwhile, Ezzard Charles defeated Jersey Joe Walcott to win the vacant National Boxing Association championship title. Savold defeated Woodcock in four rounds to win the IBU title, while Charles gained New York State Athletic Commission recognition and wide public acclaim as champion upon defeating former champion Joe Louis in September 1950. On June 15, 1951, Joe Louis defeated Savold via sixth-round knockout, after which the IBU withdrew its recognition of Savold and proclaimed Ezzard Charles as champion.
  11. Following Marciano's retirement, Patterson was matched against Tommy "Hurricane" Jackson in a championship eliminator on June 8, 1956. Winning via controversial split decision, Patterson then faced light heavyweight titleholder Archie Moore for the vacant title. Upon defeating Moore, Patterson fought (and defeated) Jackson a second time on July 29, 1957.
  12. The World Boxing Association withdrew their championship recognition of Clay (by then known as Muhammad Ali) upon agreeing to an immediate rematch against former champion Sonny Liston, in violation of WBA rules. The newly founded World Boxing Council and other sanctioning groups continued to recognize Ali as champion.
  13. The World Boxing Association, World Boxing Council, New York State Athletic Commission and others withdrew their championship recognition of Ali following his refusal to be inducted into the United States Army subsequent to his conscription.
  14. To fill its vacant championship title, the World Boxing Association organized a single-elimination tournament involving eight of their ranked contenders (Joe Frazier, who was ranked No. 2, declined to participate): Oscar Bonavena, Jimmy Ellis, Leotis Martin, Karl Mildenberger, two-time former champion Floyd Patterson, Jerry Quarry, Thad Spencer, and former WBA champion Ernie Terrell. In first round matches, Ellis defeated Martin, Quarry defeated Patterson, Spencer defeated Terrell, and Bonavena defeated Mildenberger. In the semi-finals, Ellis defeated Bonavena while Quarry defeated Spencer; and Ellis defeated Quarry for the championship title. Frazier, meanwhile, was matched against Buster Mathis for a championship recognized by the New York State Athletic Commission together with the commissions of Illinois, Maine, Massachusetts and Pennsylvania. Similar "world" championship recognition was bestowed upon him by the Texas Athletic Commission following a victory over Dave Zyglewicz on April 22, 1969.
  15. Frazier defeated Ellis to unify the heavyweight championship, but did not gain World public acclaim as champion until defeating Muhammad Ali on March 8, 1971.
  16. In an unprecedented move, upon withdrawing its recognition of Leon Spinks as champion, the World Boxing Council immediately recognized Ken Norton as champion, based on an earlier victory over Jimmy Young. As a condition of being named champion, Norton was ordered to face the WBC's new mandatory challenger, Larry Holmes within 120 days.
  17. Holmes relinquished his World Boxing Council championship and accepted championship recognition bestowed by the newly organized International Boxing Federation.
  18. Following its 1978 precedent, upon withdrawing championship recognition from Riddick Bowe, the World Boxing Council immediately awarded championship recognition to Lennox Lewis, on the basis of his victory in an October 31, 1992 "championship eliminator" over Donovan Ruddock.
  19. Following its withdrawal of recognition from George Foreman, the International Boxing Federation sanctioned a December 9, 1995, match between Francois Botha and Axel Schulz for its championship. Botha won the bout by split decision, but the bout result and Botha's championship title were vacated after Botha's post-fight drug test revealed he had taken illegal anabolic steroids. A subsequent bout between Schulz and Michael Moorer was sanctioned for the IBF championship.
  20. Upon defeating John Ruiz, Roy Jones Jr. simultaneously held the World Boxing Association's heavyweight and light heavyweight titles. At his request, the WBA suspended its rule prohibiting simultaneous title holding. It later declared Jones its "Champion in Recess," and sanctioned a December 13, 2003, bout between Ruiz and Hasim Rahman for its "interim" championship. Ruiz won the bout. On February 20, 2004, Jones relinquished his heavyweight title to resume boxing as a light heavyweight, at which point Ruiz was elevated to full championship recognition. On April 30, 2005, Ruiz was defeated by James Toney in a championship defense, but post-fight drug testing determined Toney had taken Nandrolone, an anabolic steroid. The bout's result was subsequently changed to a "no contest," whereupon the WBA reinstated Ruiz as champion.
  21. Following repeated injuries to champion Vitali Klitschko, the World Boxing Council sanctioned an August 13, 2005, bout between Hasim Rahman and Monte Barrett for its "interim" championship. Rahman won the bout, and when Klitschko relinquished his title three months later, the WBC elevated Rahman to full championship recognition.
  22. Following repeated injuries which prevented him from defending his title, the World Boxing Association designated Chagaev a "Champion in Recess," sanctioning an August 30, 2008 bout between former champions John Ruiz and Nikolai Valuev for its primary title; a bout won by Valuev. Upon his recovery however, Chagaev opted to face Wladimir Klitschko rather than Valuev, whereupon the WBA withdrew the "Champion in Recess" status.
  23. The World Boxing Association modified its championship structure, creating a new "Super Champion" status to be awarded to champions who hold multiple titles simultaneously. Now subordinated to this was the status of "World Champion," commonly referred to as the "Regular" champion. The organization then sanctioned a bout between Povetkin and former champion Ruslan Chagaev for this "regular" title. Povetkin's reign as the WBA's "regular champion" ended upon a loss to "Super Champion" Wladimir Klitschko, at which point the "regular" title was vacant.
  24. Browne defeated Ruslan Chagaev for the World Boxing Association's "regular" championship title, but Browne subsequently tested positive for Clenbuterol, a banned substance. Following confirmation of the positive result, the WBA withdrew its recognition of Browne's "regular" championship.
  25. On October 29, 1877, a fight between British fighters Tom Allen and Tompkin Gilbert at the Sadler's Wells Theatre, London was billed as for the World heavyweight title under Marquess of Queensberry Rules. Allen won in seven rounds.
  26. Bryan was due to fight Mahmoud Charr on January 29, 2021, for the WBA Regular championship, but Charr was unable to attain the right visa to come to the US, where the fight was to be held. Due to the long period of inactivity, Charr was stripped of the title and Bryan fought Bermane Stiverne for the now vacant title instead.

List of combined reigns

As of January 2, 2026.

Keys:

  Active title reign
  Reign has ended
WBO heavyweight title bouts before August 23, 1997 are not included[104]
Pos.NameCombined reignDays as championNumber of reignsTitle recognitionCumulative title winsOpponents beaten
1.Wladimir Klitschko12 years, 0 months, 0 days4 3822WBA, IBF, WBO2523
2.Joe Louis11 years, 8 months, 8 days4 2701NYSAC, NBA2722
3.Muhammad Ali9 years, 5 months, 5 days3 4433NYSAC, WBA, WBC2221
4.Lennox Lewis8 years, 5 months, 13 days3 0863WBA, WBC, IBF1515
5.Vitali Klitschko7 years, 5 months, 28 days2 7353WBC, WBO1515
6.Larry Holmes7 years, 3 months, 12 days2 6611WBC, IBF2020
7.Jack Dempsey7 years, 2 months, 19 days2 6381NYSAC, NBA66
8.John L. Sullivan7 years, 0 months, 10 days2 5661Universal55
9.Jack Johnson6 years, 3 months, 11 days2 2921Universal66
10.Evander Holyfield6 years, 1 month, 1 day2 2234WBA, WBC, IBF1110
11.James J. Jeffries5 years, 11 months, 4 days2 1561Universal86
12.Tyson Fury5 years, 1 month, 12 days1 8662WBA, WBC, IBF, WBO54
13.Deontay Wilder5 years, 1 month, 5 days1 8591WBC108
14.Anthony Joshua4 years, 11 months, 17 days1 8062WBA, IBF, WBO99
15.Joe Frazier4 years, 10 months, 18 days1 7851NYSAC, WBA, WBC1010
16.Floyd Patterson4 years, 10 months, 0 days1 7652NYSAC, NBA87
17.James J. Corbett4 years, 6 months, 10 days1 6521Universal22
18.Oleksandr Usyk4 years, 4 months and 9 days1,5921WBA, WBC, IBF, WBO63
19.Jess Willard4 years, 2 months, 29 days1 5511Universal22
20.Chris Byrd3 years, 10 months, 22 days1 4212IBF, WBO55

List of individual reigns

The list includes The Ring belt. Career total time as champion (for multiple time champions) does not apply.

As of January 2, 2026.

Keys:

  Active Title Reign
  Reign has ended
The WBO heavyweight title bouts before August 1997 are not included
Pos.NameTitle ReignTitle recognitionSuccessful DefensesOpponents beaten
1.Joe Louis11 years, 8 months, 8 daysUniversal2621
2.Wladimir Klitschko9 years, 7 months and 6 daysIBF (+WBA, WBO, The Ring)1817
3.Larry Holmes7 years, 3 months, 12 daysWBC-to-IBF (+The Ring)1919
4.Jack Dempsey7 years, 2 months, 19 daysUniversal55
5.John L. Sullivan7 years, 0 months, 9 daysUniversal55
6.Jack Johnson6 years, 3 months, 10 daysUniversal66
7.Muhammad Ali5 years, 11 months, 9 daysThe Ring, (+WBA, WBC stripped)99
8.James J. Jeffries5 years, 11 months, 4 daysUniversal76
9.Vitali Klitschko5 years, 2 months, 4 daysWBC99
10.Deontay Wilder5 years, 1 month, 5 daysWBC108
11.Joe Frazier4 years, 10 months, 18 daysNYSAC (+WBA, WBC)99
12.James J. Corbett4 years, 6 months, 10 daysUniversal11
13.Oleksandr Usyk4 years, 4 months and 9 daysWBA (+WBC, IBF stripped, WBO, The Ring)53
14.Jess Willard4 years, 2 months, 29 daysUniversal11
15.Tyson Fury4 years, 2 months, 26 daysWBC (+The Ring)33
16.Lennox Lewis4 years, 2 months, 15 daysWBC (+IBF, WBA stripped, The Ring)98
17.Rocky Marciano3 years, 11 months, 29 daysUniversal65
18.Chris Byrd3 years, 4 months, 8 daysIBF44
19.Mike Tyson3 years, 2 months, 20 daysWBC (+WBA, IBF, The Ring)99
20.Anthony Joshua3 years, 1 month and 23 daysIBF (+WBA, WBO)66

By country

Map of countries, number of current and former world heavyweight boxing champions per country (as of 23 December 2024). Note: interim titles and secondary belts are not included
CountryTotalBoxers by Name
United States 55 John L. Sullivan, James J. Corbett, James J. Jeffries, Marvin Hart, Jack Johnson, Jess Willard, Jack Dempsey, Gene Tunney, Jack Sharkey, Max Baer, James J. Braddock, Joe Louis, Ezzard Charles, Jersey Joe Walcott, Rocky Marciano, Floyd Patterson, Sonny Liston, Muhammad Ali, Ernie Terrell, Joe Frazier, Jimmy Ellis, George Foreman, Leon Spinks, Ken Norton, Larry Holmes, John Tate, Mike Weaver, Michael Dokes, Tim Witherspoon, Pinklon Thomas, Greg Page, Tony Tubbs, Michael Spinks, Mike Tyson, James Smith, Tony Tucker, Buster Douglas, Evander Holyfield, Ray Mercer, Michael Moorer, Riddick Bowe, Tommy Morrison, Michael Bentt*, Oliver McCall, Bruce Seldon, Chris Byrd, John Ruiz, Hasim Rahman, Oleg Maskaev*, Roy Jones Jr., Lamon Brewster, Shannon Briggs, Deontay Wilder, Charles Martin, Andy Ruiz Jr.*
United Kingdom 11 Bob Fitzsimmons, Lennox Lewis*, Michael Bentt*, Herbie Hide, Frank Bruno, Henry Akinwande, David Haye, Tyson Fury, Anthony Joshua, Daniel Dubois, Fabio Wardley
Canada 4 Lennox Lewis*, Tommy Burns, Trevor Berbick*, Bermane Stiverne
Russia 3 Nikolai Valuev, Oleg Maskaev*, Sultan Ibragimov
Ukraine 3 Vitali Klitschko, Wladimir Klitschko, Oleksandr Usyk
Italy 2 Primo Carnera, Francesco Damiani
South Africa 2 Gerrie Coetzee, Corrie Sanders
Germany 1 Max Schmeling
Sweden 1 Ingemar Johansson
Belarus 1 Siarhei Liakhovich
Uzbekistan 1 Ruslan Chagaev
Nigeria 1 Samuel Peter
New Zealand 1 Joseph Parker*
Jamaica 1 Trevor Berbick*
Samoa 1 Joseph Parker*
Haiti 1 Bermane Stiverne*
Mexico 1 Andy Ruiz Jr.*

See also

Further reading

  • Florio, John; Shapiro, Ouisie (2013). One Punch from the Promised Land: Leon Spinks, Michael Spinks, and the Myth of the Heavyweight Title. Lyons Press. p. 279. ISBN 978-0-7627-8300-7.

Notes

References

  1. ^"John L. Sullivan"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. p. 52: John L Sullivan record: Aug 29 1885, Dominick McCaffrey, Cincinnati, W 6, Won-Vac M of Q World-H
  2. ^"James J. Corbett"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. pp. 94, 95: James J. Corbett gained lasting fame when he knocked out the hugely popular John L. Sullivan to take the heavyweight title in 1892. The first heavyweight to win a championship under the Marquess of Queensberry Rules [...] James J Corbett record: Mar 17 1897, Bob Fitzsimmons, Carson City, NV, KO'd 14, Lost-World-H
  3. ^"Bob Fitzsimmons"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. p. 129: Bob Fitzsimmons record: Mar 17 1897, Champion James J. Corbett, Carson City, NV, KO 14, Won-World-H
  4. ^"James J. Jeffries"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. p. 157: James J. Jeffries record: Jul 25 1902, Champion Bob Fitzsimmons, Coney Island, NY, KO 11, Won-World-H [...] Jeffries defended his title four more times with four knockout victories before retiring. Included among his victims were Fitzsimmons, Corbett, and Ruhlin. After six years of retirement, at age 35, Jeffries returned to the ring in an attempt to wrest the championship from Jack Johnson
  5. ^"Jack Root"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. p. 237: Jul 3 1905, Marvin Hart, Reno, NV, KO'd 12, For-Vac World-H [...] When Jim Jeffries retired, a few years later, he selected Root and Hart to meet for the heavyweight title he was vacating. The fight was held in Reno on July 3, 1905. Root weighed 170 pounds, and Hart tipped the scales at 190. Root was considered the favorite and fought well early on. He had a big lead through seven rounds and floored Hart at the end of the seventh. However, Hart was saved by the bell. In the ninth and tenth, momentum began to go in Hart's direction. In the twelfth, Hart unleashed a hard right to the left of Root's heart. Root collapsed in a heap and was counted out by Jeffries, the referee.
  6. ^"Tommy Burns"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. pp. 86, 87: In 1905, when he knocked out Dave Barry in San Francisco, promoter Tom McCarey proposed matching him with heavyweight champ Marvin Hart. [...] Tommy Burns record: Feb 23 1906, Champion Marvin Hart, Los Angeles, W 20, Won-World-H
  7. ^"Jack Johnson"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. p. 159: Jack Johnson record: Dec 26 1908, Champion Tommy Burns, Sydney TKO 14, Won-World-H
  8. ^"Jess Willard"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. p. 281: Jess Willard record: Apr 5 1915, Champion Jack Johnson, Havana, Cuba, KO 26, Won-World-H
  9. ^"Jack Dempsey"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. p. 111: Jack Dempsey record: Jul 4, 1919, Champion Jess Willard, Toledo, OH, TKO 3, Won-World-H; Sep 23 1926, Gene Tunney, Philadelphia, L 10, Lost-World-H
  10. ^"The Ring updates championship policy". Ring TV. May 3, 2012.
  11. ^"Professional boxing record: John L. Sullivan". Retrieved March 14, 2020.
  12. ^"Professional boxing record: James J. Corbett". Retrieved March 14, 2020.
  13. ^"Professional boxing record: Bob Fitzsimmons". Retrieved March 14, 2020.
  14. ^"Professional boxing record: James J. Jeffries". Retrieved March 14, 2020.
  15. ^"Professional boxing record: Marvin Hart". Retrieved March 14, 2020.
  16. ^"Professional boxing record: Tommy Burns". Retrieved March 14, 2020.
  17. ^"Professional boxing record: Jack Johnson". Retrieved March 14, 2020.
  18. ^"Professional boxing record: Jess Willard". Retrieved March 14, 2020.
  19. ^ abc"Professional boxing record: Jack Dempsey". Retrieved March 14, 2020.
  20. ^"Professional boxing record: Gene Tunney". Retrieved March 14, 2020.
  21. ^ ab"Professional boxing record: Max Schmeling". Retrieved March 14, 2020.
  22. ^"Professional boxing record: Jack Sharkey". Retrieved March 14, 2020.
  23. ^"Professional boxing record: Primo Carnera". Retrieved March 14, 2020.
  24. ^"Professional boxing record: Max Baer". Retrieved March 14, 2020.
  25. ^"Professional boxing record: Jim Braddock". Retrieved March 14, 2020.
  26. ^"Professional boxing record: Joe Louis". Retrieved March 14, 2020.
  27. ^"Joe Louis, p. 575"(pdf). The Boxing Register: International Boxing Hall Of Fame Official Record Book. International Boxing Hall Of Fame. Retrieved May 26, 2019. Johnny Davis, Ret-World-H
  28. ^ abc"Professional boxing record: Ezzard Charles". Retrieved March 14, 2020.
  29. ^"Professional boxing record: Jersey Joe Walcott". Retrieved March 14, 2020.
  30. ^"Professional boxing record: Rocky Marciano". Retrieved March 14, 2020.
  31. ^ ab"Professional boxing record: Floyd Patterson". Retrieved March 14, 2020.
  32. ^"Professional boxing record: Ingemar Johansson". Retrieved March 14, 2020.
  33. ^ ab"Professional boxing record: Sonny Liston". Retrieved March 14, 2020.
  34. ^ abcde"Professional boxing record: Muhammad Ali". Retrieved March 14, 2020.
  35. ^"Professional boxing record: Ernie Terrell". Retrieved March 14, 2020.
  36. ^ ab"Professional boxing record: Joe Frazier". Retrieved March 14, 2020.
  37. ^"Professional boxing record: Jimmy Ellis". Retrieved March 14, 2020.
  38. ^ abc"Professional boxing record: George Foreman". Retrieved March 14, 2020.
  39. ^ ab"Professional boxing record: Leon Spinks". Retrieved March 14, 2020.
  40. ^"Professional boxing record: Ken Norton". Retrieved March 15, 2020.
  41. ^ ab"Professional boxing record: Larry Holmes". Retrieved March 15, 2020.
  42. ^"Professional boxing record: John Tate". Retrieved March 15, 2020.
  43. ^"Professional boxing record: Mike Weaver". Retrieved March 15, 2020.
  44. ^"Professional boxing record: Michael Dokes". Retrieved March 15, 2020.
  45. ^"Professional boxing record: Gerrie Coetzee". Retrieved March 15, 2020.
  46. ^ ab"Professional boxing record: Tim Witherspoon". Retrieved March 15, 2020.
  47. ^"Professional boxing record: Pinklon Thomas". Retrieved March 15, 2020.
  48. ^"Professional boxing record: Greg Page". Retrieved March 15, 2020.
  49. ^"Professional boxing record: Tony Tubbs". Retrieved March 15, 2020.
  50. ^"Professional boxing record: Michael Spinks". Retrieved March 18, 2020.
  51. ^"Professional boxing record: Trevor Berbick". Retrieved March 18, 2020.
  52. ^ abcdef"Professional boxing record: Mike Tyson". Retrieved March 18, 2020.
  53. ^"Professional boxing record: James Smith". Retrieved March 18, 2020.
  54. ^"Professional boxing record: Tony Tucker". Retrieved March 18, 2020.
  55. ^"Professional boxing record: Francesco Damiani". Retrieved March 19, 2020.
  56. ^"Professional boxing record: James Douglas". Retrieved March 19, 2020.
  57. ^ abcde"Professional boxing record: Evander Holyfield". Retrieved March 19, 2020.
  58. ^"Professional boxing record: Ray Mercer". Retrieved March 19, 2020.
  59. ^ abc"Professional boxing record: Michael Moorer". Retrieved March 19, 2020.
  60. ^ abc"Professional boxing record: Riddick Bowe". Retrieved March 19, 2020.
  61. ^ abcdef"Professional boxing record: Lennox Lewis". Retrieved March 19, 2020.
  62. ^"Professional boxing record: Tommy Morrison". Retrieved March 19, 2020.
  63. ^"Professional boxing record: Michael Bentt". Retrieved March 19, 2020.
  64. ^ ab"Professional boxing record: Herbie Hide". Retrieved March 19, 2020.
  65. ^"Professional boxing record: Oliver McCall". Retrieved March 19, 2020.
  66. ^"Professional boxing record: Bruce Seldon". Retrieved March 19, 2020.
  67. ^"Professional boxing record: Frank Bruno". Retrieved March 19, 2020.
  68. ^"Professional boxing record: Henry Akinwande". Retrieved March 19, 2020.
  69. ^ abc"Professional boxing record: Vitali Klitschko". Retrieved March 19, 2020.
  70. ^ ab"Professional boxing record: Chris Byrd". Retrieved March 19, 2020.
  71. ^ abcd"Professional boxing record: Wladimir Klitschko". Retrieved March 20, 2020.
  72. ^ ab"Professional boxing record: John Ruiz". Retrieved March 20, 2020.
  73. ^ ab"Professional boxing record: Hasim Rahman". Retrieved March 20, 2020.
  74. ^"Professional boxing record: Roy Jones Jr". Retrieved March 20, 2020.
  75. ^"Professional boxing record: Corrie Sanders". Retrieved March 20, 2020.
  76. ^"Professional boxing record: Lamon Brewster". Retrieved March 21, 2020.
  77. ^ ab"Professional boxing record: Nikolai Valuev". Retrieved March 21, 2020.
  78. ^"Professional boxing record: Siarhei Liakhovich". Retrieved March 21, 2020.
  79. ^"Professional boxing record: Oleg Maskaev". Retrieved March 21, 2020.
  80. ^"Президент России предоставил гражданство Олегу Маскаеву".
  81. ^"Professional boxing record: Shannon Briggs". Retrieved March 21, 2020.
  82. ^ abc"Professional boxing record: Ruslan Chagaev". Retrieved March 20, 2020.
  83. ^"Professional boxing record: Sultan Ibragimov". Retrieved March 21, 2020.
  84. ^"Professional boxing record: Samuel Peter". Retrieved March 21, 2020.
  85. ^"Professional boxing record: David Haye". Retrieved March 21, 2020.
  86. ^"Professional boxing record: Alexander Povetkin". Retrieved March 21, 2020.
  87. ^"Professional boxing record: Bermane Stiverne". Retrieved March 21, 2020.
  88. ^"Professional boxing record: Deontay Wilder". Retrieved March 21, 2020.
  89. ^ abc"Professional boxing record: Tyson Fury". Retrieved March 20, 2020.
  90. ^"Professional boxing record: Charles Martin". Retrieved March 20, 2020.
  91. ^"Professional boxing record: Lucas Browne". Retrieved March 20, 2020.
  92. ^ abcd"Professional boxing record: Anthony Joshua". Retrieved March 20, 2020.
  93. ^"Professional boxing record: Joseph Parker". Retrieved March 20, 2020.
  94. ^"Professional boxing record: Manuel Charr". Retrieved March 20, 2020.
  95. ^"Professional boxing record: Andy Ruiz Jr". Retrieved March 20, 2020.
  96. ^"Professional boxing record: Trevor Bryan". Retrieved October 10, 2021.
  97. ^"Professional boxing record: Oleksandr Usyk". Retrieved October 10, 2021.
  98. ^ ab"IBF HEAVYWEIGHT TITLE STATUS". IBF Official Website. Retrieved June 29, 2024.
  99. ^"Professional boxing record: Daniel Dubois". Retrieved November 18, 2025.
  100. ^"Mahmoud Charr Reinstated As WBA 'Regular' Heavyweight Titlist, Ordered To Next Face Jarrell Miller". Retrieved September 3, 2023.
  101. ^"Professional boxing record: Kubrat Pulev". Retrieved November 18, 2025.
  102. ^"Professional boxing record: Fabio Wardley". Retrieved November 18, 2025.
  103. ^"Professional boxing record: Murat Gassiev". Retrieved December 13, 2025.
  104. ^Several IBHOF inductees’ professional boxing records printed in the organization's official record books indicate that IBHOF did not recognize WBO as a major organization until at least August 23, 1997:
    • IBHOF official record book, 1997 edition
      • Sugar Ray Leonard's opponent Thomas Hearns, who was defending the WBO super middleweight title against him on 12 June 1989, is not marked as World Champion
    • IBHOF official record book, 1999 edition
      • Sugar Ray Leonard's opponent Thomas Hearns, who was defending the WBO super middleweight title against him on 12 June 1989, is not marked as World Champion
    • IBHOF official record book, 2002 edition
      • Sugar Ray Leonard's opponent Thomas Hearns, who was defending the WBO super middleweight title against him on 12 June 1989, is not marked as World Champion
    • IBHOF official record book, 2006 edition
      • Sugar Ray Leonard's opponent Thomas Hearns, who was defending the WBO super middleweight title against him on 12 June 1989, is not marked as World Champion
      • Michael Carbajal's opponent Josue Camacho, who was defending the WBO junior flyweight title against him on 15 July 1994, is not marked as World Champion
      • Michael Carbajal's opponent Jorge Arce, who was defending the WBO junior flyweight title against him on 31 July 1999, is marked as World Champion
    • IBHOF official record book, 2011 edition
      • Sugar Ray Leonard's opponent Thomas Hearns, who was defending the WBO super middleweight title against him on 12 June 1989, is not marked as World Champion
      • Michael Carbajal's opponent Josue Camacho, who was defending the WBO junior flyweight title against him on 15 July 1994, is not marked as World Champion
      • Ricardo Lopez's opponent Alex Sanchez, who was defending the WBO minimumweight title against him on 23 August 1997, is marked as World Champion
      • Michael Carbajal's opponent Jorge Arce, who was defending the WBO junior flyweight title against him on 31 July 1999, is marked as World Champion

Sources