Sorted alphabetically by last name · 2769 fighters
| Name | Nickname | |
|---|---|---|
| JC | Jimmy Crute | |
| JF | Jimmy Flick | "The Brick" |
| JQ | Jimmy Quinlan | "Crash" |
| JH | Jimy Hettes | "The Kid" |
| JS | Jin Soo Son | |
| JY | Jinh Yu Frey | |
| JP | Jiri Prochazka | |
| JC | Joachim Christensen |
| JB | Joanderson Brito | "Tubarao" |
| JJ | Joanna Jedrzejczyk |