Poids Mi-Moyens Hommes
 | Joe Jordan | 0-1-0 UFC | #6536 |  |
 | Joe Merritt | 0-1-0 UFC | #5748 | |
 | Joe Middleton | 3-1-0 REC | #1231 |  |
 | Joel Alvarez | 8-3-0 UFC | #298 |  |
 | Joel dos Santos | 0-2-0 REC | #5348 |  |
 | Joel Salviano | 0-1-0 REC | #5607 | |
 | Joey Davis | 0-1-0 REC | #6880 | |
 | Joey Hart | 4-3-0 REC | #850 | |
 | Johan Rodriguez | 1-1-0 REC | #5853 |  |
 | John Adajar | 0-1-0 REC | #5899 |  |
 | John Caldone | 1-0-0 REC | #7063 | |
 | John Caseneuil | 1-2-0 REC | #3913 |  |
 | John Hathaway | 7-2-0 UFC | #1485 | |
 | John Howard | 7-7-0 UFC | #1086 | |
 | John Maguire | 2-3-0 UFC | #3736 | |
 | John Palaiologos | 1-4-0 REC | #4064 |  |
 | Joilton Lutterbach | 0-3-0 REC | #4049 | |
 | Jon Koppenhaver | 1-1-0 UFC | #3384 | |
 | Jon Manley | 0-1-0 UFC | #6812 | |
 | Jon Tabarez | 0-1-0 REC | #6276 | |