Poids Mi-Lourds Hommes
 | Kamil Saidov | 1-0-0 REC | #1504 |  |
 | Karl Albrektsson | 0-4-0 REC | #3147 |  |
 | Karl Moore | 3-2-0 REC | #3158 |  |
 | Karl Reed | 0-2-0 REC | #5869 |  |
 | Karlos Vemola | 2-4-0 UFC | #447 |  |
 | Kassoum Kone | 1-0-0 REC | #1445 |  |
 | Kazuo Takahashi | 1-0-0 UFC | #5016 |  |
 | Keith Berish | 0-1-0, 1NC UFC | #4488 | |
 | Keith Hackney | 2-2-0 UFC | #2715 | |
 | Keith Mielke | 0-1-0 UFC | #5917 | |
 | Kenneth Bergh | #7129 |  | |
 | Kevin Christian | 0-1-0 UFC | #2725 |  |
 | Kevin Jackson | 2-2-0 UFC | #2992 | |
 | Kevin Randleman | 4-3-0 UFC | #1017 | |
 | Khabib Nabiev | 0-1-0 REC | #5266 | |
 | Khadis Ibragimov | 0-4-0 UFC | #3530 | |
 | Khalid Murtazaliev | 1-0-0 UFC | #3324 | |
 | Khalil Rountree | 10-7-0, 1NC UFC | #97 | |
 | Khuseyn Tatalaev | 0-1-0 REC | #6379 | |
 | Kleber Silva | 2-3-0 REC | #3314 | |