/
| Champion | Won | Lost | Days |
|---|---|---|---|
| O'Shaquie Foster | 2 Nov 2024 | Current | 718 |
| O'Shaquie Foster | 11 Feb 2023 | 6 Jul 2024 | 511 |
| Óscar Valdez | 20 Feb 2021 | 30 Apr 2022 | 434 |
| Miguel Berchelt | 28 Jan 2017 | 20 Feb 2021 | 1,484 |
| Takashi Miura | 8 Apr 2013 | 21 Nov 2015 | 957 |
| Gamaliel Díaz | 27 Oct 2012 | 8 Apr 2013 | 163 |
| Takahiro Ao | 26 Nov 2010 | 27 Oct 2012 | 701 |
| Humberto Soto | 20 Dec 2008 | 18 Mar 2010 | 453 |
| Marco Antonio Barrera | 27 Nov 2004 | 17 Mar 2007 | 840 |
| Jesús Chávez | 15 Aug 2003 | 28 Feb 2004 | 197 |
| Sirimongkol Singwangcha | 24 Aug 2002 | 15 Aug 2003 | 356 |
| Genaro Hernández | 22 Mar 1997 | 3 Oct 1998 | 560 |
| Azumah Nelson | 1 Dec 1995 | 22 Mar 1997 | 477 |
| Gabriel Ruelas | 17 Sept 1994 | 1 Dec 1995 | 440 |
| Azumah Nelson | 29 Feb 1988 | 7 May 1994 | 2,259 |
| Julio César Chávez | 13 Sept 1984 | 29 Dec 1987 | 1,202 |
| Héctor Camacho | 7 Aug 1983 | 6 Jul 1984 | 334 |
| Bobby Chacon | 11 Dec 1982 | 27 Jun 1983 | 198 |
| Rolando Navarrete | 29 Aug 1981 | 29 May 1982 | 273 |
| Rafael Limón | 11 Dec 1980 | 8 Mar 1981 | 87 |
| Alexis Argüello | 28 Jan 1978 | 1 Nov 1980 | 1,008 |
| Alfredo Escalera | 5 Jul 1975 | 28 Jan 1978 | 938 |
| Kuniaki Shibata | 28 Feb 1974 | 5 Jul 1975 | 492 |
| Ricardo Arredondo | 10 Oct 1971 | 28 Feb 1974 | 872 |
| Yoshiaki Numata | 5 Apr 1970 | 10 Oct 1971 | 553 |
| Rene Barrientos | 15 Feb 1969 | 5 Apr 1970 | 414 |
| Hiroshi Kobayashi | 14 Dec 1967 | 20 Jan 1969 | 403 |
| Gabriel Elorde | 16 Feb 1963 | 15 Jun 1967 | 1,580 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.