Poids Mi-Moyens Hommes
 | Jimmy Drago | 0-1-0 REC | #4399 |  |
 | Jingliang Li | 11-7-0 UFC | #414 |  |
 | Jivko Stoimenov | 0-1-0 REC | #6833 |  |
 | Jixie Molapo | 1-1-0 REC | #2024 |  |
 | Joaquin Buckley | 11-5-0 UFC | #144 | |
 | Joe Jordan | 0-1-0 UFC | #6381 | |
 | Joe Merritt | 0-1-0 UFC | #5421 | |
 | Joe Middleton | 3-1-0 REC | #375 |  |
 | Joel Alvarez | 8-2-0 UFC | #310 |  |
 | Joel dos Santos | 0-2-0 REC | #5008 |  |
 | Joel Salviano | 0-1-0 REC | #5271 | |
 | Joey Davis | 0-1-0 REC | #6234 | |
 | Joey Hart | 3-3-0 REC | #1926 | |
 | Johan Rodriguez | 1-1-0 REC | #5149 |  |
 | John Adajar | 0-1-0 REC | #5331 |  |
 | John Caldone | 1-0-0 REC | #6365 | |
 | John Caseneuil | 1-2-0 REC | #3443 |  |
 | John Hathaway | 7-2-0 UFC | #1303 | |
 | John Howard | 7-7-0 UFC | #977 | |
 | John Maguire | 2-3-0 UFC | #3432 | |