Poids Mouches Hommes
 | Jesus Aguilar | 4-3-0 UFC | #1264 |  |
 | Jimmy Flick | 2-4-0 UFC | #2383 |  |
 | Joby Sanchez | 1-4-0 UFC | #3199 | |
 | John Moraga | 8-6-0 UFC | #1279 | |
 | Jon delos Reyes | 1-3-0 UFC | #3831 |  |
 | Jordan Espinosa | 2-4-0 UFC | #2715 | |
 | Jose Maria Tome | 0-2-0 UFC | #5451 |  |
 | Jose Ochoa | 2-2-0 UFC | #778 |  |
 | Joseph Benavidez | 15-6-0 UFC | #224 | |
 | Joseph Morales | 3-2-0 UFC | #1334 | |
 | Josh Ferguson | 0-2-0 UFC | #5212 | |
 | Josh Sampo | 1-3-0 UFC | #4246 | |
 | Joshua Van | 10-1-0 UFC | #21 |  |
 | Juancamilo Ronderos | 0-2-0 UFC | #4922 |  |
 | Jussier da Silva | 9-7-0 UFC | #1044 | |
 | Justin Scoggins | 4-5-0 UFC | #2686 | |
 | Kai Kara-France | 8-5-0 UFC | #528 |  |
 | Kevin Borjas | 2-4-0 UFC | #608 | |
 | Kiru Sahota | 0-1-0 UFC | #3002 |  |
 | Kyoji Horiguchi | 9-2-0 UFC | #84 |  |