Poids Moyens Hommes
 | Kazuhiro Nakamura | 0-2-0 UFC | #4703 |  |
 | KB Bhullar | 0-2-0 UFC | #5257 |  |
 | Keiichiro Yamamiya | 0-1-0 UFC | #6908 | |
 | Keith Jardine | 6-7-0 UFC | #1660 |  |
 | Keith Rockel | 1-1-0 UFC | #5420 | |
 | Kellian Streicher | #7703 |  | |
 | Kelvin Gastelum | 14-11-0, 1NC UFC | #203 | |
 | Kendall Grove | 7-6-0 UFC | #1703 | |
 | Kenichi Yamamoto | 2-1-0 UFC | #3357 | |
 | Kennedy Rayomba | 0-2-0 REC | #4002 |  |
 | Kerim Engizek | 6-1-0 REC | #922 |  |
 | Kevin Casey | 1-3-1, 2NC UFC | #3497 | |
 | Kevin Del | 2-0-0 REC | #1402 | |
 | Kevin Hangs | 0-1-0 REC | #6696 | |
 | Keyes Nelson | 0-1-0 REC | #7060 | |
 | Khadzhimurat Bestaev | 0-2-0 REC | #5538 |  |
 | Khamzat Chimaev | 9-0-0 UFC | #10 |  |
 | Kirill Medvedovski | 0-1-0 REC | #7277 |  |
 | Korey Kuppe | 0-3-0 REC | #5071 | |
 | Kris McCray | 0-3-0 UFC | #4092 | |