/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Emanuel Navarrete | 3 Feb 2023 | Current | 1,356 |
| Shakur Stevenson | 23 Oct 2021 | 22 Sept 2022 | 334 |
| Jamel Herring | 25 May 2019 | 23 Oct 2021 | 882 |
| Masayuki Itō | 28 Jul 2018 | 25 May 2019 | 301 |
| Román Martínez | 11 Apr 2015 | 11 Jun 2016 | 427 |
| Orlando Salido | 14 Oct 2014 | 11 Apr 2015 | 179 |
| Miguel Beltrán, Jr. | 15 Sept 2012 | 9 Nov 2013 | 420 |
| Adrien Broner | 26 Nov 2011 | 20 Jul 2012 | 237 |
| Ricky Burns | 4 Sept 2010 | 13 Sept 2011 | 374 |
| Román Martínez | 14 Mar 2009 | 4 Sept 2010 | 539 |
| Nicky Cook | 9 Sept 2008 | 14 Mar 2009 | 186 |
| Joan Guzmán | 16 Sept 2006 | 14 May 2008 | 606 |
| Jorge Rodrigo Barrios | 8 Apr 2005 | 15 Sept 2006 | 525 |
| Mike Anchondo | 15 Jul 2004 | 7 Apr 2005 | 266 |
| Anatoly Alexandrov | 16 May 1998 | 7 Aug 1999 | 448 |
| Regilio Tuur | 24 Sept 1994 | 17 Jan 1997 | 846 |
| Jimmi Bredahl | 4 Sept 1992 | 5 Mar 1994 | 547 |
| Kamel Bou Ali | 9 Dec 1989 | 21 Mar 1992 | 833 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.