Tous les combattants
 | Kitt Campbell | 2-0-0 REC | #1562 |  |
 | Kiya O'Sullivan | 0-1-0 REC | #4635 |  |
 | Kkhiri Kkhiriev | 2-0-0 REC | #420 |  |
 | Klaudia Sygula | 2-1-0 UFC | #910 |  |
 | Kleber Koike Erbst | 2-3-0 REC | #1227 |  |
 | Kleber Silva | 2-3-0 REC | #3350 | |
 | Kleberson Sousa | 0-1-0 REC | #6142 | |
 | Kleydson Rodrigues | 1-3-0 UFC | #3041 | |
 | Klidson Abreu | 1-2-0, 1NC UFC | #1226 | |
 | Kodai Yamasaki | #7491 |  | |
 | Kody Steele | 0-1-0 UFC | #2516 |  |
 | Kohl Laren | 0-3-0 REC | #2883 | |
 | Koji Kitao | 0-1-0 UFC | #4498 | |
 | Koji Oishi | 0-2-0 UFC | #4867 | |
 | Koji Takeda | 2-2-0 REC | #1071 | |
 | Koki Akada | 0-3-0 REC | #3292 | |
 | Kolton Englund | 0-2-0 REC | #3816 | |
 | Konmon Deh | 0-2-0 REC | #4824 |  |
 | Konrad Dyrschka | 3-0-0 REC | #1814 |  |
 | Konrad Rusinski | 2-2-0 REC | #1515 | |
 | Konstantin Erokhin | 0-2-0 UFC | #4792 | |
 | Konstantin Podoynitsyn | 0-1-0 REC | #5565 | |
 | Konstantinos Ntelis | 3-1-0 REC | #449 |  |
 | Korey Kuppe | 0-3-0 REC | #4892 | |
 | Korey Taylor | #7314 |  |