Poids Lourds Hommes
 | Justin Smith | 0-1-0 REC | #7237 |  |
 | Justin Tafa | 4-5-0, 1NC UFC | #1358 |  |
 | Justin Willis | 4-1-0 UFC | #2786 | |
 | Justin Wren | 0-1-0 UFC | #6907 | |
 | Kacper Paczoski | 1-0-0 REC | #2086 |  |
 | Kamil Gawryjolek | 2-2-0 REC | #3875 | |
 | Kamil Minda | 2-2-0 REC | #4843 | |
 | Karl Williams | 3-1-0 UFC | #1621 |  |
 | Karrar Hammodi | #7282 |  | |
 | Kasim Aras | 2-2-0 REC | #1817 |  |
 | Katsuhisa Fujii | 1-1-0 UFC | #5411 |  |
 | Katsuyoshi Sasaki | 0-1-0 REC | #7117 | |
 | Keigo Kunihara | 0-1-0 UFC | #7142 | |
 | Kelvin Tiller | 3-4-0 REC | #3610 | |
 | Ken Shamrock | 7-6-2 UFC | #588 | |
 | Kennedy Nzechukwu | 8-6-1 UFC | #476 |  |
 | Kent Mafileo | 0-1-0 REC | #6957 | |
 | Kenzo Soares Silva | 3-2-0 REC | #2561 | |
 | Kerisson Leal | 0-2-0 REC | #7187 |  |
 | Kerry Schall | 0-1-0 UFC | #4894 | |