Tous les combattants
 | Josiah Harrell | 0-1-0 UFC | #742 |  |
 | Josiah Reyes | 1-1-0 REC | #4996 | |
 | Josiane Nunes | 3-3-0 UFC | #2244 |  |
 | Josiane Oliveira | 0-1-0 REC | #6498 | |
 | Josias Musasa | 0-2-0 UFC | #2373 |  |
 | Josiel Silva | 3-0-0, 1NC REC | #1038 | |
 | Jostin Quilca | 0-1-0 REC | #4953 |  |
 | Jota Ninomiya | 0-1-0 REC | #6971 | |
 | Journey Newson | 1-4-0, 1NC UFC | #3085 | |
 | Jovan Leka | 1-0-0 REC | #2026 |  |
 | Jovan Zeljkovic | 0-1-0 REC | #5303 | |
 | Jovana Dukic | 0-1-0 REC | #6390 | |
 | Jovidon Khojaev | 0-1-0 REC | #5971 |  |
 | Joy Pendell | 2-1-0 REC | #2104 | |
 | Jozef Jaloviar | 0-1-0 REC | #7060 |  |
 | Jozef Wittner | 1-2-0 REC | #3645 | |
 | Jozette Cotton | 0-1-0 REC | #6705 | |
 | JP Buys | 0-4-0 UFC | #2903 |  |
 | JR Coughran | 0-1-0 REC | #6508 | |
 | Juan Adams | 1-3-0 UFC | #3208 | |
 | Juan Archuleta | 2-2-0 REC | #4117 | |
 | Juan Cabrera | #7296 |  | |
 | Juan Diaz | 1-0-0 REC | #1510 |  |
 | Juan Espino | 2-1-0 UFC | #3048 |  |
 | Juan Manuel Puig | 0-2-0 UFC | #4367 |  |