Combattants Brésil
| 551 |  | Junior Duarte | #7770 |  | |
| 552 |  | Junior Melo | #6781 | | |
| 553 |  | Junior Orgulho | #7881 | | |
| 554 |  | Juscelino Pantoja | 9-2-0 MMA | #6167 | |
| 555 |  | Jussier da Silva | 9-7-0 UFC | #1104 | |
| 556 |  | Kaik Brito | #453 | | |
| 557 |  | Kaique Modesto | #7915 | | |
| 558 |  | Kalindra Faria | 0-3-0 UFC | #4228 | |
| 559 |  | Karine Silva | 5-3-0 UFC | #1109 | |
| 560 |  | Karol Rosa | 8-5-0 UFC | #381 | |
| 561 |  | Karol Silva | #6528 | | |
| 562 |  | Karoline Martins | #7847 | | |
| 563 |  | Kaua Campos | #8402 | | |
| 564 | | Kaua Fernandes | #7426 | | |
| 565 |  | Kauan Leopoldina | #6765 | | |
| 566 |  | Kaue Fernandes | 3-2-0 UFC | #918 | |
| 567 |  | Kaue Vaz | #5684 | | |
| 568 |  | Kayck Alencar | #6498 | | |
| 569 |  | Kaynan Kruschewsky | 0-2-0 UFC | #4110 | |
| 570 |  | Kelly Ottoni | #7830 | | |
| 571 |  | Kerisson Leal | #7459 | | |
| 572 |  | Ketlen Souza | 4-4-0 UFC | #672 | |
| 573 |  | Ketlen Vieira | 10-5-0 UFC | #463 | |
| 574 |  | Kevin Christian | 0-2-0 UFC | #2350 | |
| 575 |  | Keweny Lopes | 12-5-1 MMA | #2669 | |