Tous les combattants
 | Khetag Morgoev | 1-0-0 REC | #2730 |  |
| Khetag Sabeev | #7742 | | |
| Khizir Magomadov | 1-0-0 REC | #767 | |
 | Kholmurod Nurmatov | 1-4-0 REC | #1934 |  |
 | Khumoyun Tukhtamuradov | #7350 | | |
 | Khurshed Kakhorov | 4-1-0 REC | #2969 |  |
 | Khusein Askhabov | 0-1-0 UFC | #5449 | |
 | Khuseyn Tatalaev | 0-1-0 REC | #7058 | |
 | Kibedy Gordon | 1-0-0 REC | #5156 |  |
 | Kiefer Crosbie | 0-3-0 UFC | #2763 |  |
 | Kiichi Kunimoto | 3-2-0 UFC | #3414 |  |
 | Kikadze Bondo | 1-0-0 REC | #6163 |  |
| Killian Layour | 0-1-0 REC | #7671 |  |
 | Killys Mota | 3-1-0 REC | #3622 |  |
 | Kim Tinghaugen | 0-1-0 REC | #6979 |  |
 | Kim Tran | #7933 |  | |
 | Kimbert Alintozon | 0-1-0 REC | #6125 |  |
 | Kimo Leopoldo | 2-4-0 UFC | #2736 |  |
 | King Green | 16-12-1, 1NC UFC | #100 | |
 | King Rikuto | #7768 | | |
 | Kinnedy Hundley | 0-1-0 REC | #5403 | |
 | Kiran Singh | 0-1-0 REC | #5459 |  |
 | Kirill Grishenko | 1-0-0 REC | #2086 |  |
 | Kirill Kornilov | 4-2-0 REC | #1091 | |
 | Kirill Kudaktin | 0-1-0 REC | #5684 | |