/
| Champion | Won | Lost | Days |
|---|---|---|---|
| Usman Nurmagomedov | 25 Jan 2025 | Current | 633 |
| Justin Gaethje | 31 Dec 2016 | 25 Jan 2025 | 2,947 |
| Justin Gaethje | 12 Mar 2016 | 12 Mar 2016 | 0 |
| Justin Gonzales | 12 Mar 2016 | 31 Dec 2016 | 294 |
| Chris Saunders | 20 Feb 2016 | 12 Mar 2016 | 21 |
| Justin Gaethje | 5 Jul 2014 | 20 Feb 2016 | 595 |
Built from title bouts on record. Vacated or stripped titles are not visible in bout results, so very recent changes can lag.
