Tous les combattants
 | Jin Soo Son | 0-2-0 UFC | #4554 |  |
 | Jin Tanaka | 1-0-0 REC | #1743 |  |
 | Jin Wakita | 0-1-0 REC | #5934 | |
 | Jingliang Li | 11-7-0 UFC | #452 |  |
 | Jinh Yu Frey | 2-6-0 UFC | #2914 |  |
 | Jiniushiyue | 3-2-0 REC | #1516 | |
 | Jinnosuke Kashimura | 2-3-0 REC | #1171 | |
 | Jiri Prochazka | 6-3-0 UFC | #69 |  |
 | Jivko Stoimenov | 0-1-0 REC | #7443 |  |
 | Jixie Molapo | 1-1-0 REC | #2852 | |
 | JJ Aldrich | 11-6-0 UFC | #384 | |
 | JJ Okanovich | 1-0-0 REC | #6949 | |
 | Jo Arai | 0-2-0 REC | #4698 | |
 | Joab Souza | 0-1-0 REC | #6365 |  |
 | Joachim Christensen | 1-3-0 UFC | #3893 |  |
 | Joan Arastey | 0-2-0 REC | #6376 |  |
 | Joan Rodriguez | 0-1-0 REC | #5351 | |
 | Joana Chevreuil | 0-2-0 REC | #4904 |  |
 | Joanderson Brito | 7-3-0 UFC | #277 | |
 | Joanna Jedrzejczyk | 10-5-0 UFC | #160 |  |
 | Joanne Wood | 9-8-0 UFC | #1115 |  |
 | Joao Dantas | 0-1-0 REC | #4766 | |
 | Joao Dos Santos | 0-1-0 REC | #6862 | |
 | Joao Elias | 0-1-0 REC | #6481 | |
 | Joao Lucas Oliveira | 1-1-0 REC | #5958 | |