Poids Mi-Moyens Hommes
 | Kamaru Usman | 16-4-0 UFC | #40 |  |
 | Karim Adem | #8017 |  | |
 | Karim Ghajji | 0-3-0 REC | #4297 |  |
 | Karim Rabei | 0-1-0, 1NC REC | #4916 |  |
 | Karl Amoussou | 0-2-0 REC | #3940 | |
 | Karo Parisyan | 8-4-0, 1NC UFC | #1236 |  |
 | Karol Skrzypek | 0-1-0 REC | #6444 |  |
 | Kassius Kayne | 0-1-0 REC | #7939 | |
 | Kazushi Sakuraba | 1-0-0, 1NC UFC | #3963 |  |
 | Keita Nakamura | 4-7-0 UFC | #2379 | |
 | Keith Wisniewski | 0-4-0 UFC | #4205 | |
 | Kelvin Rayford | 0-1-0 REC | #6768 | |
 | Ken Burrs | 0-1-0 REC | #6432 | |
 | Kenan Song | 6-5-0 UFC | #1534 |  |
 | Kendly St. Louis | 3-2-0 REC | #2355 | |
 | Kenny Robertson | 4-5-0 UFC | #2604 | |
 | Kevin Burns | 2-3-0 UFC | #3590 | |
 | Kevin Holland | 16-12-0, 1NC UFC | #145 | |
 | Kevin Jousset | 2-2-0 UFC | #1536 | |
 | Kevin Ruart | #7826 |  |