Tous les combattants
 | Kit Cope | 0-1-0 UFC | #5251 |  |
 | Kitt Campbell | 2-0-0 REC | #1872 |  |
 | Kiya O'Sullivan | 0-1-0 REC | #4828 |  |
 | Kkhiri Kkhiriev | 2-0-0 REC | #784 |  |
 | Klaudia Sygula | 2-1-0 UFC | #1229 |  |
 | Kleber Koike Erbst | 2-3-0 REC | #1515 |  |
 | Kleber Silva | 2-3-0 REC | #3548 | |
 | Kleberson Sousa | 0-1-0 REC | #6410 | |
 | Kleydson Rodrigues | 1-3-0 UFC | #3134 | |
 | Klidson Abreu | 1-2-0, 1NC UFC | #1207 | |
 | Kodai Yamasaki | 0-1-0 REC | #5994 |  |
 | Kody Steele | 1-1-0 UFC | #364 | |
 | Kohl Laren | 0-3-0 REC | #3080 | |
 | Koji Kitao | 0-1-0 UFC | #4613 | |
 | Koji Oishi | 0-2-0 UFC | #5054 | |
 | Koji Takeda | 2-2-0 REC | #1414 | |
 | Koki Akada | 0-3-0 REC | #3535 | |
 | Kolton Englund | 0-2-0 REC | #4021 | |
 | Konmon Deh | 0-2-0 REC | #4902 |  |
 | Konrad Dyrschka | 3-0-0 REC | #2048 |  |
 | Konrad Rusinski | 2-2-0 REC | #1817 | |
 | Konstantin Erokhin | 0-2-0 UFC | #4945 | |
 | Konstantin Podoynitsyn | 0-1-0 REC | #5889 | |
 | Konstantinos Ntelis | 3-1-0 REC | #801 |  |
 | Korey Kuppe | 0-3-0 REC | #5068 | |