Tous les combattants
 | Kitt Campbell | 2-0-0 REC | #1807 |  |
 | Kiya O'Sullivan | 0-1-0 REC | #4801 |  |
 | Kkhiri Kkhiriev | 2-0-0 REC | #693 |  |
 | Klaudia Sygula | 2-1-0 UFC | #1153 |  |
 | Kleber Koike Erbst | 2-3-0 REC | #1465 |  |
 | Kleber Silva | 2-3-0 REC | #3503 | |
 | Kleberson Sousa | 0-1-0 REC | #6349 | |
 | Kleydson Rodrigues | 1-3-0 UFC | #3136 | |
 | Klidson Abreu | 1-2-0, 1NC UFC | #1288 | |
 | Kodai Yamasaki | 0-1-0 REC | #5867 |  |
 | Kody Steele | 1-1-0 UFC | #2561 |  |
 | Kohl Laren | 0-3-0 REC | #3044 | |
 | Koji Kitao | 0-1-0 UFC | #4605 | |
 | Koji Oishi | 0-2-0 UFC | #5032 | |
 | Koji Takeda | 2-2-0 REC | #1336 | |
 | Koki Akada | 0-3-0 REC | #3490 | |
 | Kolton Englund | 0-2-0 REC | #3979 | |
 | Konmon Deh | 0-2-0 REC | #4946 |  |
 | Konrad Dyrschka | 3-0-0 REC | #2012 |  |
 | Konrad Rusinski | 2-2-0 REC | #1754 | |
 | Konstantin Erokhin | 0-2-0 UFC | #4886 | |
 | Konstantin Podoynitsyn | 0-1-0 REC | #5790 | |
 | Konstantinos Ntelis | 3-1-0 REC | #720 |  |
 | Korey Kuppe | 0-3-0 REC | #5065 | |
 | Korey Taylor | 0-1-0 REC | #5002 |  |