Poids Moyens Hommes
 | Karl Roberson | 4-6-0 UFC | #2118 |  |
 | Kazuhiro Nakamura | 0-2-0 UFC | #5046 |  |
 | KB Bhullar | 0-2-0 UFC | #5636 |  |
 | Keiichiro Yamamiya | 0-1-0 UFC | #7266 | |
 | Keith Jardine | 6-7-0 UFC | #1715 | |
 | Keith Rockel | 1-1-0 UFC | #5583 | |
 | Kellian Streicher | #8023 |  | |
 | Kelvin Gastelum | 14-11-0, 1NC UFC | #251 | |
 | Kendall Grove | 7-6-0 UFC | #1834 | |
 | Kenichi Yamamoto | 2-1-0 UFC | #3720 | |
 | Kennedy Rayomba | 1-2-0 REC | #1284 |  |
 | Kerim Engizek | 6-2-0 REC | #1180 |  |
 | Kevin Casey | 1-3-1, 2NC UFC | #3759 | |
 | Kevin Del | 2-0-0 REC | #2165 | |
 | Kevin Hangs | 0-1-0 REC | #5929 | |
 | Keyes Nelson | 0-1-0 REC | #7692 | |
 | Khadzhimurat Bestaev | 0-2-0 REC | #5984 |  |
 | Khamzat Chimaev | 9-1-0 UFC | #30 |  |
 | Kirill Medvedovski | 0-1-0 REC | #7388 |  |
 | Korey Kuppe | 0-3-0 REC | #5311 | |