Tous les combattants
 | King Green | 17-12-1, 1NC UFC | #75 |  |
 | King Rikuto | #7947 |  | |
 | Kinnedy Hundley | 0-1-0 REC | #5663 | |
 | Kiran Singh | 0-1-0 REC | #5667 |  |
 | Kirill Grishenko | 1-0-0 REC | #2393 |  |
 | Kirill Kornilov | 4-2-0 REC | #1393 |  |
 | Kirill Kudaktin | 0-1-0 REC | #5961 | |
 | Kirill Medvedovski | 0-1-0 REC | #7313 |  |
 | Kirill Negru | 0-1-0 REC | #6266 |  |
 | Kiru Sahota | 0-1-0 UFC | #3015 |  |
 | Kisa Miyake | 0-1-0 REC | #5831 | |
 | Kishvar Khudoyorov | 0-1-0 REC | #7600 | |
 | Kit Cope | 0-1-0 UFC | #5517 | |
 | Kitt Campbell | 2-0-0 REC | #2454 |  |
 | Kiya O'Sullivan | 0-1-0 REC | #5221 |  |
 | Kkhiri Kkhiriev | 2-0-0 REC | #1553 | |
 | Klaudia Sygula | 2-1-0 UFC | #1406 |  |
 | Kleber Koike | 2-4-0 REC | #1810 |  |
 | Kleber Silva | 2-3-0 REC | #3883 | |
 | Kleberson Sousa | 0-1-0 REC | #6828 | |
 | Kleydson Rodrigues | 1-3-0 UFC | #3407 | |
 | Klidson Abreu | 1-2-0, 1NC UFC | #1608 | |
 | Kodai Yamasaki | 0-1-0 REC | #6309 | |
 | Kody Steele | 1-1-0 UFC | #982 | |
 | Kohl Laren | 0-3-0 REC | #3419 | |