Poids Mi-Moyens Hommes
 | Josh Rafferty | 0-1-0 UFC | #5892 |  |
 | Josh Stuart | 0-1-0 UFC | #5728 | |
 | Josiah Harrell | 0-1-0 UFC | #1479 | |
 | Junie Browning | 1-1-0 UFC | #4323 | |
 | Justin Edwards | 2-5-0 UFC | #3332 | |
 | Jutaro Nakao | 1-1-0 UFC | #4852 |  |
 | K.J. Noons | 2-3-0, 1NC UFC | #3431 | |
 | Kamaru Usman | 16-3-0 UFC | #29 |  |
 | Karo Parisyan | 8-4-0, 1NC UFC | #1238 | |
 | Kazushi Sakuraba | 1-0-0, 1NC UFC | #3861 | |
 | Keita Nakamura | 4-7-0 UFC | #2328 | |
 | Keith Wisniewski | 0-4-0 UFC | #4078 | |
 | Kenan Song | 6-5-0 UFC | #1544 |  |
 | Kenny Robertson | 4-5-0 UFC | #2508 | |
 | Kevin Burns | 2-3-0 UFC | #3460 | |
 | Kevin Holland | 16-12-0, 1NC UFC | #125 | |
 | Kevin Jousset | 2-2-0 UFC | #1511 |  |
 | Khaos Williams | 7-4-0 UFC | #367 | |
 | Kiefer Crosbie | 0-3-0 UFC | #2771 |  |
 | Kiichi Kunimoto | 3-2-0 UFC | #3428 | |