| Fighter | Record | Last Bout |
|---|---|---|
| Jordan Espinosa | 15-9-0 (1 NC) | 2021-03-06 |
| Jordan Griffin | 18-9-0 | 2021-04-10 |
| Jordan Johnson | 10-0-0 | 2018-09-15 |
| Jordan Mein | 31-12-0 | 2018-07-28 |
| Jordan Radev | 23-5-0 | 2007-12-29 |
| Jordan Rinaldi | 14-7-0 | 2019-03-16 |
| Jordan Williams | 9-6-0 (1 NC) | 2021-11-06 |
| Jordan Wright | 12-5-0 (1 NC) | 2023-02-18 |
| Jorge de Oliveira | 9-2-0 | 2015-03-21 |
| Jorge Gurgel | 14-10-0 | 2008-11-15 |
| Jorge Lopez | 11-5-0 | 2012-05-15 |
| Jorge Masvidal | 35-17-0 | 2023-04-08 |
| Jorge Patino | 38-19-2 (2 NC) | 1999-01-08 |
| Jorge Rivera | 20-9-0 | 2012-01-20 |
| Jorge Santiago | 25-12-0 | 2013-02-16 |
| Jose Maria | 37-7-0 (2 NC) | 2013-11-09 |
| Jose Quinonez | 9-5-0 | 2020-12-05 |
| Jose Torres | 8-1-0 | 2018-08-04 |
| Joseph Benavidez | 28-8-0 | 2021-03-06 |
| Joseph Gigliotti | 7-2-0 | 2016-12-09 |
| Joseph Holmes | 8-4-0 | 2023-05-06 |
| Joseph Sandoval | 7-7-0 | 2012-01-20 |
| Josh Barnett | 35-8-0 | 2016-09-03 |
| Josh Bryant | 15-4-0 | 2010-06-19 |
| Josh Clopton | 6-2-1 | 2013-08-03 |
| Josh Copeland | 12-4-0 | 2015-03-14 |
| Josh Culibao | 11-4-1 | 2024-08-17 |
| Josh Ferguson | 10-5-0 | 2012-07-11 |
| Josh Fremd | 11-6-0 | 2024-07-13 |
| Josh Grispi | 14-5-0 | 2013-02-16 |
| Josh Haynes | 14-11-0 | 2007-04-07 |
| Josh Hendricks | 19-11-0 (1 NC) | 2008-11-15 |
| Josh Koscheck | 17-11-0 | 2015-03-21 |
| Josh Neer | 36-16-1 | 2013-02-23 |
| Josh Parisian | 15-8-0 | 2024-03-09 |
| Josh Quinlan | 6-3-0 (1 NC) | 2024-06-15 |
| Josh Rafferty | 9-8-0 | 2005-04-09 |
| Josh Samman | 13-4-0 | 2016-07-13 |
| Josh Sampo | 11-5-0 | 2015-05-23 |
| Josh Shockley | 11-4-0 | 2015-02-22 |
| Josh Shockman | 6-3-0 | 2006-11-18 |
| Josh Stansbury | 4-8-0 | 2017-06-25 |
| Josh Stuart | 1-4-0 | 1998-03-13 |
| Josh Thomson | 22-9-0 (1 NC) | 2015-07-15 |
| Joshua Burkman | 28-16-0 (1 NC) | 2018-02-18 |
| Joshua Weems | 11-3-0 | 2022-10-29 |
| Journey Newson | 10-5-0 (1 NC) | 2023-04-29 |
| JP Buys | 9-6-0 | 2023-08-12 |
| Juan Adams | 5-3-0 | 2020-02-08 |
| Juan Espino | 11-2-0 | 2021-04-17 |