Sorted alphabetically by last name · 2769 fighters
| Name | Nickname | |
|---|---|---|
| JT | Jason Thacker | |
| JV | Jason Von Flue | "Live Wire" |
| JW | Jason Witt | "The Vanilla Gorilla" |
| JY | Jason Young | "Shotgun" |
| JM | Javad Mahjoub | |
| JB | Javid Basharat | "The Snow Leopard" |
| JR | Javier Reyes | "Blair" |
| JV |
| "Showtime" |
| JC | Jay Cucciniello |
| JH | Jay Hieron | "The Thoroughbred" |