Tous les combattants
 | Josiah Harrell | 0-2-0 UFC | #1444 |  |
 | Josiah Reyes | 1-1-0 REC | #5695 | |
 | Josiane Nunes | 3-3-0 UFC | #2544 |  |
 | Josiane Oliveira | 0-1-0 REC | #7608 | |
 | Josias Musasa | 0-2-0 UFC | #2704 |  |
 | Josiel Silva | 4-0-0, 1NC REC | #952 | |
 | Jostin Quilca | 0-1-0 REC | #6027 |  |
 | Josua Hernandez | 0-1-0 REC | #7106 |  |
 | Jota Ninomiya | 0-1-0 REC | #7683 | |
 | Journey Newson | 1-4-0, 1NC UFC | #3452 | |
 | Jovan Leka | 1-0-0 UFC | #695 |  |
 | Jovan Zeljkovic | 0-1-0 REC | #6178 | |
 | Jovana Dukic | 0-1-0 REC | #6634 | |
 | Jovidon Khojaev | 0-1-0 REC | #6678 |  |
 | Joy Pendell | 2-1-0 REC | #2965 | |
 | Jozef Jaloviar | 0-2-0 REC | #4493 |  |
 | Jozef Wittner | 1-3-0 REC | #3601 | |
 | Jozette Cotton | 0-1-0 REC | #6083 | |
 | JP Buys | 0-4-0 UFC | #3301 |  |
 | JR Coughran | 0-1-0 REC | #7318 | |
 | Juan Adams | 1-3-0 UFC | #3747 | |
 | Juan Archuleta | 2-2-0 REC | #4809 | |
 | Juan Cabrera | #8001 |  | |
 | Juan Diaz | 1-0-0 UFC | #1087 |  |
 | Juan Espino | 2-1-0 UFC | #3460 |  |