The undisputed champion in boxing is a fighter who holds all belts from the four major governing bodies: the WBC, WBA, WBO and IBF.
The IBO belt is not generally considered when deciding the status of an undisputed champion, due to the computerised system that the body uses for its rankings. The Ring championship title is also not factored into the undisputed champion status.
A unified champion is a fighter who holds belts from two or more bodies, but not necessarily all four major titles for the division.
Read next | Undisputed champion vs. unified champion
Oleksandr Usyk became the first undisputed world heavyweight champion in the four belt era when he defeated Tyson Fury on points in May 2024. That also made the Ukrainian the first undisputed heavyweight king since British fighter Lennox Lewis in 1999.
However, that only lasted five weeks despite Usyk never losing a fight. The IBF ordered him to vacate his belt to Daniel Dubois, because he did not fight their mandatory challenger next.
Here is the rundown of every undisputed champion in heavyweight history (the recognised sanctioning bodies have changed over the years).
List of every undisputed heavyweight champion
Reign started | Reign ended | Boxer | Belts |
July 24, 1922 | Sept. 23, 1926 | Jack Dempsey | NYSAC, NBA |
Sept. 23, 1926 | July 31, 1928 | Gene Tunney | NYSAC, NBA |
June 12 1930 | Jan. 7, 1931 | Max Schmeling | NYSAC, NBA |
June 21, 1932 | June 29, 1933 | Jack Sharkey | NYSAC, NBA |
June 29, 1933 | June 14, 1934 | Primo Carnera | NYSAC, NBA |
June 14, 1934 | June 13, 1935 | Max Baer | NYSAC, NBA |
June 13, 1935 | June 22, 1937 | James J. Braddock | NYSAC, NBA |
June 22, 1937 | March 1, 1949 | Joe Louis | NYSAC, NBA |
Sept. 27, 1950 | July 18, 1951 | Ezzard Charles | NYSAC, NBA |
July 18, 1951 | Sept. 23, 1952 | Jersey Joe Walcott | NYSAC, NBA |
Sept. 23, 1952 | April 27, 1956 | Rocky Marciano | NYSAC, NBA |
Nov. 30, 1956 | June 26, 1959 | Floyd Patterson | NYSAC, NBA |
June 26, 1959 | June 20, 1960 | Ingemar Johansson | NYSAC, NBA |
June 20, 1960 | Sept. 25, 1962 | Floyd Patterson | NYSAC, NBA |
Sept. 25, 1962 | July 22, 1963 | Sonny Liston | NYSAC, WBA |
July 22, 1963 | Feb. 25, 1964 | Sonny Liston | WBC, WBA |
Feb. 25, 1964 | Sept. 19, 1964 | Muhammad Ali | WBC, WBA |
Feb. 6, 1967 | April 28, 1967 | Muhammad Ali | WBC, WBA |
Feb. 16, 1970 | Jan. 22, 1973 | Joe Frazier | WBC, WBA |
Jan. 22, 1973 | Oct. 30, 1974 | George Foreman | WBC, WBA |
Oct. 30, 1974 | Feb. 15, 1978 | Muhammad Ali | WBC, WBA |
Feb. 15, 1978 | March 18, 1978 | Leon Spinks | WBC, WBA |
Aug. 1, 1987 | Feb. 11, 1990 | Mike Tyson | WBC, WBA, IBF |
Feb. 11, 1990 | Oct. 25, 1990 | James "Buster" Douglas | WBC, WBA, IBF |
Oct. 25, 1990 | Nov. 13, 1992 | Evander Holyfield | WBC, WBA, IBF |
Nov. 13, 1992 | Dec. 14, 1992 | Riddick Bowe | WBC, WBA, IBF |
Nov. 13, 1999 | April 29, 2000 | Lennox Lewis | WBC, WBA, IBF |
May 19, 2024 | Jun. 25, 202 | Oleksandr Usyk | WBC, WBA, WBO and IBF |
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