Poids Légers Hommes
 | Jovidon Khojaev | 0-1-0 REC | #5965 |  |
 | Juan Pablo Vieira | 3-0-0 REC | #1750 |  |
 | Juan Sarrios | 0-1-0 REC | #6986 |  |
 | Juan Velasquez Jr. | #6243 |  | |
 | Julian Schlouch | 0-1-0 REC | #7558 |  |
 | Juliano Prescendo | 1-1-0 REC | #2371 | |
 | Juri Ohara | #7260 |  | |
 | Justin Buchholz | 1-4-0 UFC | #3612 | |
 | Justin Gaethje | 10-5-0 UFC | #19 | |
 | Justin James | 0-1-0 UFC | #6630 | |
 | Justin Jaynes | 1-4-0 UFC | #2668 | |
 | Justin Montalvo | 0-2-0 REC | #5604 | |
 | Justin Salas | 3-4-0 UFC | #2752 | |
 | Kacper Formela | 2-2-0 REC | #1110 |  |
 | Kacper Fornalski | 1-2-0 REC | #3140 | |
 | Kajan Johnson | 4-3-0 UFC | #1994 |  |
 | Kamal Shalorus | 0-3-0 UFC | #2425 |  |
 | Kamuela Kirk | 1-2-0 UFC | #3649 | |
 | Kane Mousah | 1-3-0 REC | #3444 |  |
 | Kanybek Zhanybekov | 0-2-0 REC | #4255 |  |