Poids Légers Hommes
 | Kendall Sandifer | 1-0-0 REC | #6339 |  |
 | Kendall Whited | 1-0-0 REC | #1812 | |
 | Kenneth Cross | 1-2-0 REC | #1795 | |
 | Kenny Mokhonoana | 4-3-0 REC | #1522 |  |
 | Kenzi Khouadra | 0-2-0 REC | #4119 |  |
 | Keoni Diggs | 1-2-0 REC | #5492 | |
 | Kevin Carrier | 3-2-0 REC | #961 | |
 | Kevin Enz | 1-4-0 REC | #2918 |  |
 | Kevin Lee | 11-8-0 UFC | #464 | |
 | Kevin Robledo | 0-1-0 REC | #6357 |  |
 | Kevin Syler | 1-1-0 REC | #5019 |  |
 | Khabib Nurmagomedov | 13-0-0 UFC | #78 |  |
 | Khairulla Khaitullaev | 0-1-0 REC | #5980 | |
 | Khama Worthy | 2-3-0 UFC | #3460 | |
 | Khamzat Salakhanov | 0-1-0 REC | #6969 | |
 | Khasu Khazaev | 1-0-0 REC | #2767 | |
 | Khumoyun Tukhtamuradov | #7381 |  | |
 | Killian Layour | 0-1-0 REC | #7806 | |
 | Killys Mota | 3-1-0 REC | #3743 |  |
 | King Green | 17-12-1, 1NC UFC | #75 | |