Tous les combattants
 | Jacob Yancey | 1-0-0 REC | #1955 |  |
 | Jacobe Smith | 3-0-0 UFC | #891 | |
 | Jacobi Jones | 2-3-0 REC | #2737 | |
 | Jacqueline Cavalcanti | 5-1-0 UFC | #340 |  |
 | Jade Jorand | 1-1-0 REC | #1199 |  |
 | Jade Masson-Wong | 0-1-0 REC | #3813 |  |
 | Jaden Ortega | #8119 | | |
 | Jady Menezes | 2-0-0 REC | #3141 |  |
 | Jae Hoon Lee | 0-1-0 REC | #7109 |  |
 | Jae Hyun Park | 1-2-0 REC | #2763 | |
 | Jaeleen Robledo | 1-0-0 REC | #3250 | |
 | Jafel Filho | 3-3-0 UFC | #1384 | |
 | Jai Herbert | 4-5-1 UFC | #632 |  |
 | Jaida Harshman | 0-1-0 REC | #6379 | |
 | Jailton Almeida | 8-3-0 UFC | #444 | |
 | Jaime Alvarez | 1-0-0 REC | #6410 | |
 | Jaime Lloyd | 1-0-0 REC | #2527 | |
 | Jaime Mora-Munoz | 0-1-0 REC | #7783 | |
 | Jaimee Nievera | 0-1-0 REC | #5559 | |
 | Jainer Ruiz-Jimenez | 0-1-0 REC | #6243 |  |
 | Jair de Oliveira | 0-1-0 REC | #5293 | |
 | Jair Farias | 0-1-0 REC | #7263 | |
 | Jairo Pacheco | 0-2-0 REC | #6128 | |
 | Jairzinho Rozenstruik | 9-6-0 UFC | #638 |  |
 | Jake Babian | 0-1-0 REC | #4095 | |