Combattants Brésil
| 551 |  | Kaue Vaz | 0-1-0 REC | #5249 |  |
| 552 |  | Kayck Alencar | 0-1-0 REC | #6295 | |
| 553 |  | Kaynan Kruschewsky | 0-2-0 UFC | #3989 | |
| 554 |  | Kelly Ottoni | 0-1-0 REC | #7585 | |
| 555 |  | Kerisson Leal | 0-2-0 REC | #7354 | |
| 556 |  | Ketlen Souza | 4-3-0 UFC | #507 | |
| 557 |  | Ketlen Vieira | 10-5-0 UFC | #379 | |
| 558 |  | Kevin Christian | 0-2-0 UFC | #2206 | |
| 559 |  | Keweny Lopes | 3-4-0 REC | #2564 | |
| 560 |  | Killys Mota | 3-1-0 REC | #3743 | |
| 561 |  | Kleber Koike | 2-4-0 REC | #1810 | |
| 562 |  | Kleber Silva | 2-3-0 REC | #3883 | |
| 563 |  | Kleberson Sousa | 0-1-0 REC | #6828 | |
| 564 |  | Kleydson Rodrigues | 1-3-0 UFC | #3407 | |
| 565 |  | Klidson Abreu | 1-2-0, 1NC UFC | #1608 | |
| 566 |  | Kristiany Carvalho | #8140 | | |
| 567 |  | Kron Gracie | 1-3-0 UFC | #2739 | |
| 568 |  | Laisa Silva | 1-0-0 REC | #2143 | |
| 569 |  | Lany Silva | 3-2-0 REC | #2684 | |
| 570 |  | Lara Procopio | 1-2-0 UFC | #4628 | |
| 571 |  | Larissa Pacheco | 0-2-0 UFC | #616 | |
| 572 |  | Laryssa Leila | 0-1-0 REC | #6800 | |
| 573 |  | Lazaro Junior | 0-1-0 REC | #5552 | |
| 574 |  | Leandro Barbosa | 0-1-0 REC | #7660 | |
| 575 |  | Leandro Camargo | 0-3-0 REC | #3489 | |