Sorted alphabetically by last name · 2715 fighters
| Name | Nickname | |
|---|---|---|
| JS | Jacare Souza | |
| JD | Jack Della Maddalena | |
| JH | Jack Hermansson | "The Joker" |
| JJ | Jack Jenkins | "Phar" |
| JM | Jack Marshman | "The Hammer" |
| JM | Jack May | "The Outlaw" |
| JM | Jack McGlaughlin | |
| JN | Jack Nilson | |
| JS | Jack Shore | "Tank" |
| JL | Jackie Lee |