Poids Mouches Hommes
 | Kevin Borjas | 2-5-0 UFC | #685 |  |
 | Kevin Fernandez | 4-0-0 REC | #1497 |  |
 | Keynan Davis | 1-2-0 REC | #5450 | |
 | Khamzat Ilyasov | 1-1-0 REC | #3182 |  |
 | Khavid Dakaev | 3-0-0 REC | #471 | |
 | King Rikuto | #8044 |  | |
 | Kiru Sahota | 0-1-0 UFC | #3059 |  |
 | Kleberson Sousa | 0-1-0 REC | #6864 |  |
 | Kue Htoo | 1-0-0 REC | #749 | |
 | Kurban Khatataev | 1-0-0 REC | #2332 | |
 | Kyle Estrada | 0-2-0 REC | #4344 | |
 | Kyohei Takagi | 2-0-0 REC | #632 | |
 | Kyoji Horiguchi | 9-2-0 UFC | #132 | |
 | Leonardo de Oliveira | 0-4-0 REC | #3470 | |
 | Leopold Goi | 0-3-0 REC | #1771 |  |
 | Lincon Santos | 3-1-0 REC | #1789 | |
 | Liridon Ramani | 0-2-0 REC | #6717 |  |
 | Livio Ribeiro | 4-0-0 REC | #1499 | |
 | Lone'er Kavanagh | 3-2-0 UFC | #135 | |
 | Lorenzo Navarro | 1-0-0 REC | #6231 | |