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WBO · Boxing
No champion on record.
| Champion | Won | Lost | Days |
|---|---|---|---|
| Canelo Álvarez | 8 May 2021 | 13 Sept 2025 | 1,589 |
| Billy Joe Saunders | 18 May 2019 | 8 May 2021 | 721 |
| Gilberto Ramírez | 9 Apr 2016 | 13 May 2019 | 1,129 |
| Arthur Abraham | 1 Mar 2014 | 9 Apr 2016 | 770 |
| Robert Stieglitz | 23 Mar 2013 | 1 Mar 2014 | 343 |
| Arthur Abraham | 25 Aug 2012 | 23 Mar 2013 | 210 |
| Robert Stieglitz | 22 Aug 2009 | 25 Aug 2012 | 1,099 |
| Denis Inkin | 27 Sept 2008 | 10 Jan 2009 | 105 |
| Joe Calzaghe | 11 Oct 1997 | 26 Sept 2008 | 4,003 |
| Steve Collins | 18 Mar 1995 | 2 Oct 1997 | 929 |
| Chris Eubank | 21 Sept 1991 | 18 Mar 1995 | 1,274 |
| Thomas Hearns | 4 Nov 1988 | 20 May 1991 | 927 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.