| Fighter | Record | Last Bout |
|---|---|---|
| Steve Bruno | 15-6-0 | 2009-02-07 |
| Steve Byrnes | 6-1-0 | 2006-12-13 |
| Sung Bin Jo | 9-1-0 | 2019-06-01 |
| TJ Brown | 17-11-0 | 2023-10-14 |
| Tae Hyun Bang | 18-10-0 | 2016-09-03 |
| Tai Bowden | 1-1-0 | 1996-12-07 |
| Talita Bernardo | 6-4-0 | 2019-05-11 |
| Tanner Boser | 22-11-1 | 2026-10-17 |
| Tereza Bleda | 7-2-0 | 2025-12-13 |
| Theodor Berggren | 8-4-0 | 2026-06-27 |
| Tim Boetsch | 21-13-0 | 2019-03-09 |
| Todd Brown | 16-4-0 (1 NC) | 2011-03-03 |
| Todd Butler | 1-4-0 | 1997-07-27 |
| Tom Blackledge | 10-7-0 | 2011-02-26 |
| Tom Breese | 12-3-0 | 2021-01-20 |
| Travis Browne | 18-7-1 | 2017-07-08 |
| Viacheslav Borshchev | 8-7-1 | 2025-11-15 |
| Vitor Belfort | 26-14-0 (1 NC) | 2018-05-12 |
| Will Brooks | 18-4-0 | 2017-11-18 |
| Yousri Belgaroui | 10-3-0 | 2026-09-12 |