/
| Champion | Won | Lost | Days |
|---|---|---|---|
| David Jimenez | 13 Jun 2026 | Current | 129 |
| Jesse Rodriguez | 22 Nov 2025 | 10 Jun 2026 | 200 |
| Fernando Martínez | 7 Jul 2024 | 22 Nov 2025 | 503 |
| Kazuto Ioka | 24 Jun 2023 | 7 Jul 2024 | 379 |
| Joshua Franco | 11 Aug 2022 | 23 Jun 2023 | 316 |
| Juan Francisco Estrada | 13 Mar 2021 | 11 Aug 2022 | 516 |
| Román González | 29 Feb 2020 | 13 Mar 2021 | 378 |
| Denkaosan Kaovichit | 26 Mar 2014 | 31 Aug 2016 | 889 |
| Kohei Kono | 31 Dec 2012 | 6 May 2013 | 126 |
| Hugo Cázares | 15 Oct 2010 | 31 Aug 2011 | 320 |
| Vic Darchinyan | 1 Nov 2008 | 28 Jul 2009 | 269 |
| Alexander Muñoz | 3 May 2007 | 17 May 2008 | 380 |
| Nobuo Nashiro | 22 Jul 2006 | 3 May 2007 | 285 |
| Martín Castillo | 3 Dec 2004 | 22 Jul 2006 | 596 |
| Alexander Muñoz | 9 Mar 2002 | 3 Dec 2004 | 1,000 |
| Celes Kobayashi | 11 Mar 2001 | 9 Mar 2002 | 363 |
| Leo Gamez | 9 Oct 2000 | 11 Mar 2001 | 153 |
| Jesús Rojas | 23 Dec 1998 | 31 Jul 1999 | 220 |
| Satoshi Iida | 23 Dec 1997 | 23 Dec 1998 | 365 |
| Yokthai Sithoar | 24 Aug 1996 | 23 Dec 1997 | 486 |
| Alimi Goitia | 22 Jul 1995 | 24 Aug 1996 | 399 |
| Hyung-Chul Lee | 18 Sept 1994 | 22 Jul 1995 | 307 |
| Katsuya Onizuka | 10 Apr 1992 | 18 Sept 1994 | 891 |
| Khaosai Galaxy | 21 Nov 1984 | 22 Dec 1991 | 2,587 |
| Jiro Watanabe | 8 Apr 1982 | 5 Jul 1984 | 819 |
| Rafael Pedroza | 5 Dec 1981 | 8 Apr 1982 | 124 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.
