Poids Moyens Hommes
 | Kamil Wojciechowski | 0-2-0 REC | #6222 |  |
 | Karl Roberson | 4-6-0 UFC | #2125 |  |
 | Kazuhiro Nakamura | 0-2-0 UFC | #4993 |  |
 | KB Bhullar | 0-2-0 UFC | #5506 |  |
 | Keiichiro Yamamiya | 0-1-0 UFC | #7125 | |
 | Keith Jardine | 6-7-0 UFC | #1714 | |
 | Keith Rockel | 1-1-0 UFC | #5428 | |
 | Kellian Streicher | #7996 |  | |
 | Kelvin Gastelum | 14-11-0, 1NC UFC | #233 | |
 | Kendall Grove | 7-6-0 UFC | #1820 | |
 | Kenichi Yamamoto | 2-1-0 UFC | #3634 | |
 | Kennedy Rayomba | 0-2-0 REC | #4550 |  |
 | Kerim Engizek | 6-2-0 REC | #1103 |  |
 | Kevin Casey | 1-3-1, 2NC UFC | #3647 | |
 | Kevin Del | 2-0-0 REC | #1949 | |
 | Kevin Hangs | 0-1-0 REC | #5835 | |
 | Keyes Nelson | 0-1-0 REC | #7540 | |
 | Khadzhimurat Bestaev | 0-2-0 REC | #5873 |  |
 | Khamzat Chimaev | 9-1-0 UFC | #28 |  |
 | Kirill Medvedovski | 0-1-0 REC | #7268 |  |