Poids Mi-Moyens Hommes
 | Josh Stuart | 0-1-0 UFC | #5910 |  |
 | Joshua Nakagawa | 0-1-0 REC | #7729 | |
 | Joshua Onwordi | 1-3-0 REC | #3439 |  |
 | Josiah Harrell | 0-1-0 UFC | #1755 | |
 | Juan Manuel Suarez | 0-2-0 REC | #5426 |  |
 | Julien Gazagnaire | 1-1-0 REC | #2423 |  |
 | Junie Browning | 1-1-0 UFC | #4414 | |
 | Junior Hernandez | 2-0-1 REC | #2383 |  |
 | Justin Burlinson | 3-1-0 REC | #2687 | |
 | Justin Edwards | 2-5-0 UFC | #3405 | |
 | Jutaro Nakao | 1-1-0 UFC | #4981 |  |
 | K.J. Noons | 2-3-0, 1NC UFC | #3552 | |
 | Kacper Koziorzebski | 5-2-0 REC | #1529 |  |
 | Kaik Brito | 6-3-0 REC | #212 |  |
 | Kamal Dzhalavov | 1-0-0 REC | #3244 |  |
 | Kamaru Usman | 16-4-0 UFC | #35 |  |
 | Karim Adem | #7989 | | |
 | Karim Ghajji | 0-3-0 REC | #4293 |  |
 | Karim Rabei | 0-1-0, 1NC REC | #4970 |  |
 | Karl Amoussou | 0-2-0 REC | #3898 | |