Poids Plumes Hommes
 | Jin Aoi | 0-2-0 REC | #4190 |  |
 | Jin Wakita | 0-1-0 REC | #6016 | |
 | Joan Rodriguez | 0-1-0 REC | #5610 |  |
 | Joanderson Brito | 7-3-0 UFC | #351 |  |
 | Joao Pedro Moreira | 1-1-0 REC | #3327 | |
 | Joao Pedro Saldanha | 1-1-0 REC | #6777 | |
 | Joao Roque | 0-1-0 UFC | #5317 |  |
 | Joao Souza | 0-1-0 REC | #6322 | |
 | Joe Doyle | 0-2-0 REC | #4628 |  |
 | Joel Batobo | 0-1-0 REC | #5868 |  |
 | Joey Gambino | 0-2-0 UFC | #5393 |  |
 | Joey Ruquet | 0-1-0 REC | #6758 | |
 | John Albert | 1-4-0 UFC | #3768 | |
 | John Cofer | 0-2-0 UFC | #5629 | |
 | John De Jesus | 2-2-0 REC | #4845 | |
 | John Donaldson | 0-1-0 REC | #6795 | |
 | John Gunderson | 1-2-0 UFC | #4742 | |
 | John Teixeira da Conceicao | 0-1-0 UFC | #3585 | |
 | Johnny Soto | 0-1-0 REC | #7901 | |
 | Jonas Bilharinho | 1-1-0 REC | #5774 | |