Poids Mi-Moyens Hommes
 | Justin Burlinson | 3-1-0 REC | #2636 |  |
 | Justin Edwards | 2-5-0 UFC | #3377 |  |
 | Jutaro Nakao | 1-1-0 UFC | #4892 |  |
 | K.J. Noons | 2-3-0, 1NC UFC | #3490 | |
 | Kacper Koziorzebski | 5-2-0 REC | #1452 |  |
 | Kaik Brito | 5-3-0 REC | #1026 |  |
 | Kamal Dzhalavov | 1-0-0 REC | #3149 |  |
 | Kamaru Usman | 16-4-0 UFC | #26 |  |
 | Karim Adem | #7966 |  | |
 | Karim Ghajji | 0-3-0 REC | #4294 |  |
 | Karim Rabei | 0-1-0, 1NC REC | #5004 |  |
 | Karl Amoussou | 0-2-0 REC | #3826 | |
 | Karo Parisyan | 8-4-0, 1NC UFC | #1217 | |
 | Karol Skrzypek | 0-1-0 REC | #6189 | |
 | Kassius Kayne | 0-1-0 REC | #7790 | |
 | Kazushi Sakuraba | 1-0-0, 1NC UFC | #3911 | |
 | Keita Nakamura | 4-7-0 UFC | #2367 | |
 | Keith Wisniewski | 0-4-0 UFC | #4084 | |
 | Kelvin Rayford | 0-1-0 REC | #6796 | |
 | Ken Burrs | 0-1-0 REC | #6047 | |