| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Jasmine | Jasudavicius | 5' 7" | 125 lbs. | 68.0" | Orthodox | 12 | 3 | 0 | ||
| Louis | Jauregui | 5' 7" | 170 lbs. | -- | 4 | 2 | 0 | |||
| Yazmin | Jauregui | 5' 3" | 115 lbs. | 64.0" | Orthodox | 11 | 2 | 0 | ||
| Justin | Jaynes | The Guitar Hero | 5' 7" | 145 lbs. | 68.0" | Orthodox | 16 | 8 | 0 | |
| Joanna | Jedrzejczyk | 5' 6" | 115 lbs. | 65.0" | Orthodox | 16 | 5 | 0 | ||
| Aaron | Jeffery | 6' 2" | 185 lbs. | 73.0" | Orthodox | 10 | 3 | 0 | ||
| Trent | Jenkins | 6' 2" | 185 lbs. | -- | 0 | 4 | 0 | |||
| Bubba | Jenkins | The Highlight Kid | 5' 7" | 145 lbs. | -- | 11 | 4 | 0 | ||
| Adrienna | Jenkins | AJ | 5' 8" | 145 lbs. | -- | 19 | 6 | 0 | ||
| Brandon | Jenkins | The Human Highlight Reel | 6' 0" | 155 lbs. | 71.0" | Switch | 15 | 9 | 0 | |
| Jack | Jenkins | Phar | 5' 7" | 145 lbs. | 68.0" | Switch | 13 | 3 | 0 | |
| Steve | Jennum | 5' 10" | 215 lbs. | -- | Orthodox | 2 | 3 | 0 | ||
| Ryan | Jensen | 6' 1" | 185 lbs. | 76.0" | Orthodox | 21 | 8 | 0 | ||
| Kyle | Jensen | 5' 9" | 170 lbs. | -- | Orthodox | 4 | 11 | 2 | ||
| Chan-Mi | Jeon | 5' 5" | 115 lbs. | -- | Orthodox | 5 | 2 | 0 | ||
| Maciej | Jewtuszko | Irokez | 6' 0" | 155 lbs. | -- | Southpaw | 12 | 3 | 0 | |
| Ronald | Jhun | The Machine Gun | 5' 11" | 170 lbs. | -- | Orthodox | 24 | 26 | 2 | |
| Baergeng | Jieleyisi | 5' 9" | 135 lbs. | 70.0" | Orthodox | 18 | 5 | 0 | ||
| Gilbert | Jimenez | -- | 155 lbs. | -- | 8 | 12 | 1 | |||
| Art | Jimmerson | 6' 1" | 196 lbs. | -- | Orthodox | 0 | 1 | 0 | ||
| Ryan | Jimmo | The Big Deal | 6' 1" | 205 lbs. | 73.0" | Orthodox | 19 | 5 | 0 | |
| Jinensibieke | Asikeerbai | 5' 6" | 155 lbs. | 69.0" | Orthodox | 36 | 11 | 0 | ||
| Jiniushiyue | Little King Kong | 5' 6" | 125 lbs. | 68.0" | Southpaw | 13 | 4 | 0 | ||
| Sung Bin | Jo | Korean Falcon | 6' 0" | 145 lbs. | 72.0" | Orthodox | 9 | 1 | 0 |