Sorted alphabetically by last name · 2715 fighters
| Name | Nickname | |
|---|---|---|
| JR | Joao Roque | |
| JZ | Joao Zeferino | "The Brazilian Samurai" |
| JS | Joaquim Silva | "Netto BJJ" |
| JB | Joaquin Buckley | "New Mansa" |
| JS | Joby Sanchez | |
| JJ | Jocelyn Jones-Lybarger | |
| JE | Jodie Esquibel | |
| JB | Joe Brammer | "The South Side Strangler" |
| JC | Joe Charles | "The Ghetto Man" |
| JD | Joe Doerksen | "El Dirte" |