| Fighter | Record | Last Bout |
|---|---|---|
| Sung Bin Jo | 9-1-0 | 2019-06-01 |
| Timothy Johnson | 12-4-0 | 2018-02-03 |
| Trent Jenkins | 0-4-0 | 1995-12-16 |
| Trevin Jones | 13-10-0 (1 NC) | 2023-03-04 |
| Virna Jandiroba | 23-4-0 | 2026-04-04 |
| Xiong Jingnan | 19-4-0 | 2026-08-29 |
| Yazmin Jauregui | 11-2-0 | 2026-09-26 |
| Yves Jabouin | 20-11-0 | 2015-08-23 |