Poids Mouches Hommes
 | Jerome Rivera | 0-4-0 UFC | #3482 |  |
 | Jesus Aguilar | 4-3-0 UFC | #1288 |  |
 | Jimmy Flick | 2-4-0 UFC | #2403 | |
 | Joby Sanchez | 1-4-0 UFC | #3215 | |
 | John Moraga | 8-6-0 UFC | #1268 | |
 | Jon delos Reyes | 1-3-0 UFC | #3849 |  |
 | Jordan Espinosa | 2-4-0 UFC | #2709 | |
 | Jose Maria Tome | 0-2-0 UFC | #5526 |  |
 | Jose Ochoa | 2-2-0 UFC | #799 |  |
 | Joseph Benavidez | 15-6-0 UFC | #232 | |
 | Joseph Morales | 3-2-0 UFC | #1319 | |
 | Josh Ferguson | 0-2-0 UFC | #5249 | |
 | Josh Sampo | 1-3-0 UFC | #4269 | |
 | Joshua Van | 10-1-0 UFC | #22 |  |
 | Juancamilo Ronderos | 0-2-0 UFC | #4962 |  |
 | Jussier da Silva | 9-7-0 UFC | #1034 | |
 | Justin Scoggins | 4-5-0 UFC | #2692 | |
 | Kai Kara-France | 8-5-0 UFC | #543 |  |
 | Kevin Borjas | 2-4-0 UFC | #693 | |
 | Kiru Sahota | 0-1-0 UFC | #3004 |  |