Poids Lourds Hommes
 | Justin McCully | 2-2-0 UFC | #4038 |  |
 | Justin Smith | 0-1-0 REC | #7386 | |
 | Justin Tafa | 4-5-0, 1NC UFC | #1479 |  |
 | Justin Willis | 4-1-0 UFC | #2799 | |
 | Justin Wren | 0-1-0 UFC | #7018 | |
 | Kacper Paczoski | 1-0-0 REC | #2399 |  |
 | Kamil Gawryjolek | 2-2-0 REC | #3971 | |
 | Kamil Minda | 2-2-0 REC | #4949 | |
 | Karl Williams | 3-1-0 UFC | #1761 |  |
 | Karrar Hammodi | #7492 |  | |
 | Kasim Aras | 2-3-0 REC | #1850 |  |
 | Katsuhisa Fujii | 1-1-0 UFC | #5563 |  |
 | Katsuyoshi Sasaki | 0-1-0 REC | #7251 | |
 | Keigo Kunihara | 0-1-0 UFC | #7238 | |
 | Kelvin Tiller | 3-4-0 REC | #3764 | |
 | Ken Shamrock | 7-6-2 UFC | #608 | |
 | Kennedy Nzechukwu | 8-6-1 UFC | #504 |  |
 | Kent Mafileo | 0-1-0 REC | #7221 | |
 | Kenzo Soares Silva | 3-2-0 REC | #2637 | |
 | Kerisson Leal | 0-2-0 REC | #7304 |  |