Poids Mouches Hommes
 | Jesus Aguilar | 4-3-0 UFC | #1277 |  |
 | Jimmy Flick | 2-4-0 UFC | #2395 |  |
 | Joby Sanchez | 1-4-0 UFC | #3214 | |
 | John Moraga | 8-6-0 UFC | #1276 | |
 | Jon delos Reyes | 1-3-0 UFC | #3832 |  |
 | Jordan Espinosa | 2-4-0 UFC | #2721 | |
 | Jose Maria Tome | 0-2-0 UFC | #5470 |  |
 | Jose Ochoa | 2-2-0 UFC | #815 |  |
 | Joseph Benavidez | 15-6-0 UFC | #230 | |
 | Joseph Morales | 3-2-0 UFC | #1352 | |
 | Josh Ferguson | 0-2-0 UFC | #5209 | |
 | Josh Sampo | 1-3-0 UFC | #4258 | |
 | Joshua Van | 10-1-0 UFC | #21 |  |
 | Juancamilo Ronderos | 0-2-0 UFC | #4937 |  |
 | Jussier da Silva | 9-7-0 UFC | #1049 | |
 | Justin Scoggins | 4-5-0 UFC | #2691 | |
 | Kai Kara-France | 8-5-0 UFC | #538 |  |
 | Kevin Borjas | 2-4-0 UFC | #645 | |
 | Kiru Sahota | 0-1-0 UFC | #3009 |  |
 | Kyoji Horiguchi | 9-2-0 UFC | #85 |  |