| Fighter | Record | Last Bout |
|---|---|---|
| Bojan Mihajlovic | 10-6-0 | 2017-09-02 |
| Bojan Velickovic | 15-6-1 | 2017-11-18 |
| Boston Salmon | 6-3-0 | 2019-10-18 |
| Brad Blackburn | 18-13-1 (1 NC) | 2010-04-10 |
| Brad Gumm | 10-6-1 (1 NC) | 2000-09-22 |
| Brad Imes | 13-7-0 | 2007-04-07 |
| Brad Kohler | 12-15-0 | 1999-09-24 |
| Brad Morris | 10-6-0 | 2008-09-17 |
| Brad Pickett | 25-14-0 | 2017-03-18 |
| Brad Riddell | 10-4-0 | 2022-11-12 |
| Brad Scott | 11-6-0 | 2018-05-27 |
| Branden Lee Hinkle | 17-11-0 (1 NC) | 2006-06-28 |
| Brandon Davis | 14-10-0 | 2022-10-15 |
| Brandon Jenkins | 15-9-0 | 2022-04-16 |
| Brandon Melendez | 25-25-0 | 2007-06-23 |
| Brandon Thatch | 11-5-0 | 2016-12-30 |
| Brandon Vera | 15-7-0 (1 NC) | 2013-08-31 |
| Brandon Wolff | 7-5-0 | 2009-05-23 |
| Braxton Smith | 5-2-0 | 2023-05-06 |
| Brendan Loughnane | 17-3-0 | 2012-12-14 |
| Brendan O'Reilly | 6-3-0 (1 NC) | 2016-12-03 |
| Brendan Schaub | 10-5-0 | 2014-12-06 |
| Brendon Marotte | 8-3-0 | 2024-09-07 |
| Brett Johns | 17-2-0 | 2020-07-18 |
| Brian Bowles | 10-3-0 | 2013-05-25 |
| Brian Camozzi | 7-5-0 | 2018-02-18 |
| Brian Cobb | 20-9-0 | 2009-02-21 |
| Brian Ebersole | 51-18-1 (1 NC) | 2015-06-06 |
| Brian Foster | 27-10-0 | 2010-11-20 |
| Brian Gassaway | 29-20-2 (1 NC) | 2005-08-20 |
| Brian Geraghty | 26-18-1 | 2007-06-23 |
| Brian Houston | 4-6-0 | 2014-01-15 |
| Brian Johnston | 5-5-0 | 1997-07-27 |
| Brian Kelleher | 24-16-0 | 2024-07-20 |
| Brian Melancon | 7-3-0 | 2013-08-28 |
| Brian Stann | 12-6-0 | 2013-03-02 |
| Brianna Fortino | 9-3-0 | 2020-06-20 |
| Bristol Marunde | 16-10-0 | 2013-08-03 |
| Brock Jardine | 12-6-0 | 2013-02-23 |
| Brock Larson | 42-10-0 | 2009-11-21 |
| Brock Lesnar | 5-3-0 (1 NC) | 2016-07-09 |
| Brodie Farber | 16-7-0 | 2008-12-10 |
| Brok Weaver | 15-6-0 | 2020-09-12 |
| Bruno Korea | 7-3-0 | 2015-11-07 |
| Bruno Santos | 15-2-0 | 2014-10-04 |
| Bruno Souza | 10-3-0 | 2022-03-26 |
| Bryan Barberena | 18-12-0 | 2024-03-16 |
| Bryan Caraway | 21-9-0 | 2018-11-30 |
| Bubba Bush | 8-3-0 (1 NC) | 2015-10-24 |
| Buddy Roberts | 12-3-0 | 2012-08-11 |