Poids Légers Hommes
 | Kenneth Cross | 1-2-0 REC | #1831 |  |
 | Kenny Mokhonoana | 4-3-0 REC | #1459 |  |
 | Kenzi Khouadra | 0-2-0 REC | #4070 |  |
 | Keoni Diggs | 1-2-0 REC | #5453 | |
 | Kevin Carrier | 3-2-0 REC | #797 | |
 | Kevin Enz | 1-4-0 REC | #2891 |  |
 | Kevin Lee | 11-8-0 UFC | #432 | |
 | Kevin Robledo | 0-1-0 REC | #6302 |  |
 | Kevin Syler | 1-1-0 REC | #5118 |  |
 | Khabib Nurmagomedov | 13-0-0 UFC | #79 |  |
 | Khairulla Khaitullaev | 0-1-0 REC | #6005 | |
 | Khama Worthy | 2-3-0 UFC | #3464 | |
 | Khamzat Salakhanov | 0-1-0 REC | #6870 | |
 | Khasu Khazaev | 1-0-0 REC | #2683 | |
 | Khumoyun Tukhtamuradov | #7424 |  | |
 | Killian Layour | 0-1-0 REC | #7776 | |
 | Killys Mota | 3-1-0 REC | #3714 |  |
 | King Green | 17-12-1, 1NC UFC | #57 | |
 | Kirill Kudaktin | 0-1-0 REC | #5870 |  |
 | Kody Steele | 1-1-0 UFC | #858 | |