/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Gary Antuanne Russell | 1 Mar 2025 | Current | 599 |
| José Valenzuela | 3 Aug 2024 | 1 Mar 2025 | 210 |
| Rolando Romero | 13 May 2023 | 30 Mar 2024 | 322 |
| Alberto Puello | 20 Aug 2022 | 10 May 2023 | 263 |
| Josh Taylor | 26 Oct 2019 | 14 May 2022 | 931 |
| Kiryl Relikh | 10 Mar 2018 | 27 Apr 2019 | 413 |
| Ricky Burns | 28 May 2016 | 15 Apr 2017 | 322 |
| Danny García | 14 Jul 2012 | 11 Sept 2015 | 1,154 |
| Lamont Peterson | 10 Dec 2011 | 11 Jul 2012 | 214 |
| Amir Khan | 18 Jul 2009 | 23 Jul 2011 | 735 |
| Andreas Kotelnik | 22 Mar 2008 | 18 Jul 2009 | 483 |
| Gavin Rees | 21 Jul 2007 | 22 Mar 2008 | 245 |
| Souleymane M'baye | 2 Sept 2006 | 21 Jul 2007 | 322 |
| Ricky Hatton | 26 Nov 2005 | 4 May 2006 | 159 |
| Vivian Harris | 16 Jun 2004 | 25 Jun 2005 | 374 |
| Kostya Tszyu | 3 Feb 2001 | 5 Aug 2002 | 548 |
| Sharmba Mitchell | 10 Oct 1998 | 3 Feb 2001 | 847 |
| Khalid Rahilou | 11 Jan 1997 | 10 Oct 1998 | 637 |
| Frankie Randall | 16 Aug 1996 | 11 Jan 1997 | 148 |
| Frankie Randall | 17 Sept 1994 | 13 Jan 1996 | 483 |
| Morris East | 9 Sept 1992 | 12 Jan 1993 | 125 |
| Edwin Rosario | 14 Jun 1991 | 10 Apr 1992 | 301 |
| Patrizio Oliva | 15 Mar 1986 | 4 Jul 1987 | 476 |
| Ubaldo Nestor Sacco | 21 Jul 1985 | 15 Mar 1986 | 237 |
| Gene Hatcher | 1 Jun 1984 | 21 Jul 1985 | 415 |
| Aaron Pryor | 2 Aug 1980 | 26 Oct 1983 | 1,180 |
| Antonio Cervantes | 25 Jun 1977 | 2 Aug 1980 | 1,134 |
| Antonio Cervantes | 28 Oct 1972 | 6 Mar 1976 | 1,225 |
| Nicolino Locche | 12 Dec 1968 | 10 Mar 1972 | 1,184 |
| Takeshi Fuji | 30 Apr 1967 | 12 Dec 1968 | 592 |
| Sandro Lopopolo | 29 Apr 1966 | 30 Apr 1967 | 366 |
| Carlos Hernández | 18 Jan 1965 | 29 Apr 1966 | 466 |
| Eddie Perkins | 15 Jun 1963 | 18 Jan 1965 | 583 |
| Duilio Loi | 15 Dec 1962 | 24 Jan 1963 | 40 |
| Duilio Loi | 1 Sept 1960 | 14 Sept 1962 | 743 |
| Carlos Ortíz | 12 Jun 1959 | 1 Sept 1960 | 447 |
| Tony Canzoneri | 24 Apr 1931 | 18 Jan 1932 | 269 |
| Jack Kid Berg | 18 Feb 1930 | 24 Apr 1931 | 430 |
| Mushy Callahan | 21 Sept 1926 | 18 Feb 1930 | 1,246 |
| Pinky Mitchell | 22 Nov 1922 | 21 Sept 1926 | 1,399 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.
