Poids Légers Hommes
 | Kevin Enz | 1-3-0 REC | #2926 |  |
 | Kevin Lee | 11-8-0 UFC | #372 |  |
 | Kevin Syler | 1-1-0 REC | #5350 |  |
 | Khabib Nurmagomedov | 13-0-0 UFC | #84 |  |
 | Khairulla Khaitullaev | 0-1-0 REC | #5785 | |
 | Khama Worthy | 2-3-0 UFC | #3172 | |
 | Khamzat Salakhanov | 0-1-0 REC | #5583 | |
 | Khasu Khazaev | 1-0-0 REC | #1803 | |
 | Killys Mota | 3-1-0 REC | #3458 |  |
 | Kirill Kudaktin | 0-1-0 REC | #5474 |  |
 | Kody Steele | 0-1-0 UFC | #2510 | |
 | Kohl Laren | 0-3-0 REC | #2864 | |
 | Koji Takeda | 2-2-0 REC | #1033 |  |
 | Kolton Englund | 0-2-0 REC | #3784 | |
 | Konrad Dyrschka | 3-0-0 REC | #1778 | |
 | Konstantinos Ntelis | 3-1-0 REC | #418 |  |
 | Korey Taylor | #7291 |  | |
 | Korey Windham | 0-1-0 REC | #6842 | |
 | Kousuke Sugimura | 1-0-0 REC | #2173 | |
 | Kristians Boguzs | 1-0-0 REC | #717 |  |