Poids Mouches Hommes
 | Jimmy Flick | 2-4-0 UFC | #2183 |  |
 | Joby Sanchez | 1-4-0 UFC | #2948 | |
 | John Moraga | 8-6-0 UFC | #1193 | |
 | Jon delos Reyes | 1-3-0 UFC | #3534 |  |
 | Jordan Espinosa | 2-4-0 UFC | #2487 | |
 | Jose Maria Tome | 0-2-0 UFC | #5041 |  |
 | Jose Ochoa | 1-2-0 UFC | #1434 |  |
 | Joseph Benavidez | 15-6-0 UFC | #216 | |
 | Joseph Morales | 3-2-0 UFC | #731 | |
 | Josh Ferguson | 0-2-0 UFC | #4643 | |
 | Josh Sampo | 1-3-0 UFC | #3887 | |
 | Joshua Van | 9-1-0 UFC | #22 |  |
 | Juancamilo Ronderos | 0-2-0 UFC | #4733 |  |
 | Jussier da Silva | 9-7-0 UFC | #968 | |
 | Justin Scoggins | 4-5-0 UFC | #2432 | |
 | Kai Asakura | 0-2-0 UFC | #766 |  |
 | Kai Kara-France | 8-5-0 UFC | #428 |  |
 | Kevin Borjas | 1-4-0 UFC | #1323 | |
 | Kiru Sahota | 0-1-0 UFC | #2658 |  |
 | Kyoji Horiguchi | 9-1-0 UFC | #56 | |