Poids Légers Hommes
 | Kelly Dullanty | 0-1-0 UFC | #5915 |  |
 | Kelton Sneve | 5-1-0 REC | #1088 |  |
 | Kendall Sandifer | 1-0-0 REC | #6389 | |
 | Kendall Whited | 1-0-0 REC | #1874 | |
 | Kenneth Cross | 1-2-0 REC | #1793 | |
 | Kenny Mokhonoana | 4-3-0 REC | #1542 |  |
 | Kenzi Khouadra | 0-2-0 REC | #4136 |  |
 | Keoni Diggs | 1-2-0 REC | #5500 | |
 | Kevin Carrier | 3-2-0 REC | #1001 | |
 | Kevin Enz | 1-4-0 REC | #2940 |  |
 | Kevin Lee | 11-8-0 UFC | #462 | |
 | Kevin Robledo | 0-1-0 REC | #6387 |  |
 | Kevin Syler | 1-1-0 REC | #5053 |  |
 | Khabib Nurmagomedov | 13-0-0 UFC | #79 |  |
 | Khairulla Khaitullaev | 0-1-0 REC | #6000 | |
 | Khama Worthy | 2-3-0 UFC | #3495 | |
 | Khamzat Salakhanov | 0-1-0 REC | #7027 | |
 | Khasu Khazaev | 1-0-0 REC | #2819 | |
 | Khumoyun Tukhtamuradov | #7397 |  | |
 | Killian Layour | 0-1-0 REC | #7818 | |