Poids Mi-Moyens Hommes
 | Joe Jordan | 0-1-0 UFC | #6567 |  |
 | Joe Merritt | 0-1-0 UFC | #5605 | |
 | Joe Middleton | 3-1-0 REC | #1046 |  |
 | Joel Alvarez | 8-3-0 UFC | #261 |  |
 | Joel dos Santos | 0-2-0 REC | #5286 |  |
 | Joel Salviano | 0-1-0 REC | #5529 | |
 | Joey Davis | 0-1-0 REC | #6740 | |
 | Joey Hart | 3-3-0 REC | #2401 | |
 | Johan Rodriguez | 1-1-0 REC | #5835 |  |
 | John Adajar | 0-1-0 REC | #5723 |  |
 | John Caldone | 1-0-0 REC | #6893 | |
 | John Caseneuil | 1-2-0 REC | #3838 |  |
 | John Hathaway | 7-2-0 UFC | #1477 | |
 | John Howard | 7-7-0 UFC | #1049 | |
 | John Maguire | 2-3-0 UFC | #3670 | |
 | John Palaiologos | 1-4-0 REC | #4025 |  |
 | Joilton Lutterbach | 0-3-0 REC | #3971 | |
 | Jon Koppenhaver | 1-1-0 UFC | #3315 | |
 | Jon Manley | 0-1-0 UFC | #6715 | |
 | Jon Tabarez | 0-1-0 REC | #6222 | |