Combattants Brésil
| 526 |  | Junior Orgulho | 0-1-0 REC | #7065 |  |
| 527 |  | Juscelino Pantoja | 0-1-0 REC | #6053 | |
| 528 |  | Jussier da Silva | 9-7-0 UFC | #1014 | |
| 529 |  | Kaik Brito | 5-3-0 REC | #773 | |
| 530 |  | Kaique Modesto | 0-1-0 REC | #7443 | |
| 531 |  | Kalindra Faria | 0-3-0 UFC | #3763 | |
| 532 |  | Karine Silva | 5-3-0 UFC | #297 | |
| 533 |  | Karol Rosa | 8-4-0 UFC | #274 | |
| 534 |  | Karol Silva | 0-1-0 REC | #5864 | |
| 535 |  | Karoline Martins | 0-1-0 REC | #7459 | |
| 536 |  | Kaua Fernandes | 0-1-0 REC | #6993 | |
| 537 |  | Kauan Leopoldina | 0-1-0 REC | #5898 | |
| 538 |  | Kaue Fernandes | 3-1-0 UFC | #1105 | |
| 539 |  | Kaue Vaz | 0-1-0 REC | #4926 | |
| 540 |  | Kayck Alencar | #7888 | | |
| 541 |  | Kaynan Kruschewsky | 0-2-0 UFC | #3862 | |
| 542 |  | Kelly Ottoni | 0-1-0 REC | #7275 | |
| 543 |  | Kerisson Leal | 0-2-0 REC | #7153 | |
| 544 |  | Ketlen Souza | 4-3-0 UFC | #203 | |
| 545 |  | Ketlen Vieira | 10-5-0 UFC | #255 | |
| 546 |  | Kevin Christian | 0-2-0 UFC | #2070 | |
| 547 |  | Keweny Lopes | 3-4-0 REC | #2412 | |
| 548 |  | Killys Mota | 3-1-0 REC | #3553 | |
| 549 |  | Kleber Koike Erbst | 2-3-0 REC | #1684 | |
| 550 |  | Kleber Silva | 2-3-0 REC | #3686 | |