Poids Mi-Lourds Hommes
 | Kassoum Kone | 1-0-0 REC | #2142 |  |
 | Kazuo Takahashi | 1-0-0 UFC | #5117 |  |
 | Keith Berish | 0-1-0, 1NC UFC | #4726 |  |
 | Keith Hackney | 2-2-0 UFC | #2972 | |
 | Keith Mielke | 0-1-0 UFC | #6501 | |
 | Kenneth Bergh | #7558 |  | |
 | Kevin Christian | 0-2-0 UFC | #2122 |  |
 | Kevin Jackson | 2-2-0 UFC | #3267 | |
 | Kevin Randleman | 4-3-0 UFC | #1151 | |
 | Khabib Nabiev | 0-1-0 REC | #4920 |  |
 | Khalid Murtazaliev | 1-0-0 UFC | #3654 | |
 | Khalil Rountree | 10-7-0, 1NC UFC | #108 | |
 | Khuseyn Tatalaev | 0-1-0 REC | #7108 | |
 | Kleber Silva | 2-3-0 REC | #3803 | |
 | Kory Moegenburg | 0-2-0 REC | #5265 | |
 | Kris Rotharmel | 0-1-0 UFC | #7312 | |
 | Krzysztof Glowacki | 1-1-0, 1NC REC | #4389 |  |
 | Krzysztof Soszynski | 6-3-0 UFC | #2150 |  |
 | Kyle Clark | 1-0-0 REC | #1556 | |
 | Kyle Kingsbury | 4-5-0 UFC | #2745 | |