Poids Lourds Hommes
 | Keigo Kunihara | 0-1-0 UFC | #7367 |  |
 | Kelvin Tiller | 3-4-0 REC | #3873 |  |
 | Ken Hasegawa | #8339 | | |
 | Ken Shamrock | 7-6-2 UFC | #640 | |
 | Kennedy Nzechukwu | 8-7-1 UFC | #463 |  |
 | Kent Mafileo | 0-1-0 REC | #7265 | |
 | Kenzo Soares Silva | 3-2-0 REC | #2656 |  |
 | Kerisson Leal | 0-2-0 REC | #7377 |  |
 | Kerry Schall | 0-1-0 UFC | #5160 | |
 | Kevin Ferguson | 1-1-0 UFC | #1621 | |
 | Kevin Jordan | 0-2-0 UFC | #5058 | |
 | Kevin Rosier | 1-2-0 UFC | #4002 | |
 | Kevin Szaflarski | 0-1-0 REC | #6948 |  |
 | Khadis Ibragimov | 0-4-0 UFC | #1189 |  |
 | Khetag Sabeev | #7978 | | |
 | Kimo Leopoldo | 2-4-0 UFC | #2819 | |
 | King Edokpolo | 3-0-0 REC | #583 | |
 | Kirill Grishenko | 1-0-0 REC | #2518 |  |
 | Kirill Kornilov | 5-2-0 REC | #287 | |
 | Klidson Abreu | 1-2-0, 1NC UFC | #1691 | |