Poids Plumes Hommes
 | Keiichiro Nakamura | 3-0-0 REC | #356 |  |
 | Keisuke Sasu | 1-3-0 REC | #3312 | |
 | Keith Keogh | 3-0-0 REC | #240 |  |
 | Kenny Florian | 12-5-0 UFC | #421 |  |
 | Keremuaili Maimaitituoheti | 0-1-0 REC | #6383 |  |
 | Kevin Aguilar | 2-4-0 UFC | #2707 | |
 | Kevin Boehm | 0-2-0 REC | #5568 | |
 | Kevin Croom | 0-3-0, 1NC UFC | #4430 | |
 | Kevin Petshi | 0-1-0 REC | #5382 |  |
 | Kevin Rosas | #7282 | | |
 | Kevin Vallejos | 3-0-0 UFC | #363 |  |
 | Khakimzhan Davronov | 0-1-0 REC | #5976 |  |
 | Khalid Musaev | 0-1-0 REC | #5601 | |
 | Khalid Taha | 1-4-0, 1NC UFC | #969 |  |
 | Khanzala Magomadov | 1-0-0 REC | #5696 | |
 | Khasan Magomedsharipov | 3-0-0 REC | #2226 | |
 | Khaseyn Shaykhaev | 1-0-0 REC | #5143 | |
 | Khaskil Amirkhanov | 0-1-0 REC | #6522 | |
| Khetag Morgoev | 1-0-0 REC | #1939 | |
 | Khumoyun Tukhtamuradov | #7101 |  |