Sorted alphabetically by last name · 2769 fighters
| Name | Nickname | |
|---|---|---|
| JM | John Matua | |
| JM | John Moraga | |
| JP | John Phillips | "The Welsh Wrecking Machine" |
| JP | John Polakowski | "Buckets of Blood" |
| JS | John Salter | |
| JT | John Teixeira | "Macapa" |
| JY | John Yannis | |
| JB | Johnny Bedford |
| "Brutal" |
| JC | Johnny Case | "Hollywood" |
| JE | Johnny Eduardo |