Poids Légers Hommes
 | Khabib Nurmagomedov | 13-0-0 UFC | #84 |  |
 | Khairulla Khaitullaev | 0-1-0 REC | #5837 | |
 | Khama Worthy | 2-3-0 UFC | #3416 |  |
 | Khamzat Salakhanov | 0-1-0 REC | #6558 | |
 | Khasu Khazaev | 1-0-0 REC | #2499 | |
 | Khumoyun Tukhtamuradov | #7368 |  | |
 | Killian Layour | 0-1-0 REC | #7679 |  |
 | Killys Mota | 3-1-0 REC | #3628 |  |
 | King Green | 17-12-1, 1NC UFC | #98 | |
 | Kirill Kudaktin | 0-1-0 REC | #5703 |  |
 | Kody Steele | 1-1-0 UFC | #694 | |
 | Kohl Laren | 0-3-0 REC | #3264 | |
 | Koji Takeda | 2-2-0 REC | #1768 |  |
 | Kolton Englund | 0-2-0 REC | #4219 | |
 | Konrad Dyrschka | 3-0-0 REC | #2316 |  |
 | Konstantinos Ntelis | 3-1-0 REC | #1160 |  |
 | Korey Taylor | 0-1-0 REC | #5471 |  |
 | Korey Windham | 0-1-0 REC | #7302 | |
 | Kousuke Sugimura | 1-0-0 REC | #2867 | |
 | Kristians Boguzs | 1-0-0 REC | #1599 |  |