Tous les combattants
 | Kkhiri Kkhiriev | 2-0-0 REC | #652 |  |
 | Klaudia Sygula | 2-1-0 UFC | #1121 |  |
 | Kleber Koike Erbst | 2-3-0 REC | #1442 |  |
 | Kleber Silva | 2-3-0 REC | #3483 | |
 | Kleberson Sousa | 0-1-0 REC | #6329 | |
 | Kleydson Rodrigues | 1-3-0 UFC | #3133 | |
 | Klidson Abreu | 1-2-0, 1NC UFC | #1268 | |
 | Kodai Yamasaki | 0-1-0 REC | #5831 |  |
 | Kody Steele | 0-1-0 UFC | #2608 |  |
 | Kohl Laren | 0-3-0 REC | #3023 | |
 | Koji Kitao | 0-1-0 UFC | #4602 | |
 | Koji Oishi | 0-2-0 UFC | #5031 | |
 | Koji Takeda | 2-2-0 REC | #1303 | |
 | Koki Akada | 0-3-0 REC | #3463 | |
 | Kolton Englund | 0-2-0 REC | #3971 | |
 | Konmon Deh | 0-2-0 REC | #4981 |  |
 | Konrad Dyrschka | 3-0-0 REC | #1988 |  |
 | Konrad Rusinski | 2-2-0 REC | #1734 | |
 | Konstantin Erokhin | 0-2-0 UFC | #4880 | |
 | Konstantin Podoynitsyn | 0-1-0 REC | #5769 | |
 | Konstantinos Ntelis | 3-1-0 REC | #674 |  |
 | Korey Kuppe | 0-3-0 REC | #5057 | |
 | Korey Taylor | 0-1-0 REC | #5015 |  |
 | Korey Windham | 0-1-0 REC | #7006 | |
 | Kory Moegenburg | 0-2-0 REC | #5119 | |