Poids Mi-Lourds Hommes
 | Kalib Starnes | 2-3-0 UFC | #3275 |  |
 | Kaloyan Kolev | 0-1-0 REC | #5340 |  |
 | Kamil Saidov | 1-0-0 REC | #1561 |  |
 | Karl Albrektsson | 0-4-0 REC | #3177 |  |
 | Karl Moore | 3-2-0 REC | #3178 |  |
 | Karl Reed | 0-2-0 REC | #5899 |  |
 | Karlos Vemola | 2-4-0 UFC | #466 |  |
 | Kassoum Kone | 1-0-0 REC | #1492 |  |
 | Kazuo Takahashi | 1-0-0 UFC | #5022 |  |
 | Keith Berish | 0-1-0, 1NC UFC | #4495 | |
 | Keith Hackney | 2-2-0 UFC | #2733 | |
 | Keith Mielke | 0-1-0 UFC | #5918 | |
 | Kenneth Bergh | #7135 |  | |
 | Kevin Christian | 0-1-0 UFC | #2712 |  |
 | Kevin Jackson | 2-2-0 UFC | #3006 | |
 | Kevin Randleman | 4-3-0 UFC | #1024 | |
 | Khabib Nabiev | 0-1-0 REC | #5228 | |
 | Khalid Murtazaliev | 1-0-0 UFC | #3338 | |
 | Khalil Rountree | 10-7-0, 1NC UFC | #98 | |
 | Khuseyn Tatalaev | 0-1-0 REC | #6431 | |