Tous les combattants
 | King Green | 17-12-1, 1NC UFC | #57 |  |
 | King Rikuto | #7892 |  | |
 | Kinnedy Hundley | 0-1-0 REC | #5620 | |
 | Kiran Singh | 0-1-0 REC | #5596 |  |
 | Kirill Grishenko | 1-0-0 REC | #2301 |  |
 | Kirill Kornilov | 4-2-0 REC | #1288 |  |
 | Kirill Kudaktin | 0-1-0 REC | #5870 | |
 | Kirill Medvedovski | 0-1-0 REC | #7268 |  |
 | Kirill Negru | 0-1-0 REC | #6196 |  |
 | Kiru Sahota | 0-1-0 UFC | #3009 |  |
 | Kisa Miyake | 0-1-0 REC | #5811 | |
 | Kishvar Khudoyorov | 0-1-0 REC | #7490 | |
 | Kit Cope | 0-1-0 UFC | #5436 | |
 | Kitt Campbell | 2-0-0 REC | #2361 |  |
 | Kiya O'Sullivan | 0-1-0 REC | #5163 |  |
 | Kkhiri Kkhiriev | 2-0-0 REC | #1424 | |
 | Klaudia Sygula | 2-1-0 UFC | #1495 |  |
 | Kleber Koike | 2-3-0 REC | #1982 |  |
 | Kleber Silva | 2-3-0 REC | #3849 | |
 | Kleberson Sousa | 0-1-0 REC | #6825 | |
 | Kleydson Rodrigues | 1-3-0 UFC | #3386 | |
 | Klidson Abreu | 1-2-0, 1NC UFC | #1553 | |
 | Kodai Yamasaki | 0-1-0 REC | #6256 | |
 | Kody Steele | 1-1-0 UFC | #858 | |
 | Kohl Laren | 0-3-0 REC | #3354 | |