Sorted alphabetically by last name · 2769 fighters
| Name | Nickname | |
|---|---|---|
| JB | Justin Buchholz | |
| JE | Justin Edwards | "Fast Eddy" |
| JE | Justin Eilers | "The Hammer" |
| JF | Justin Frazier | "The Grizzly Bear" |
| JG | Justin Gaethje | "The Highlight" |
| JJ | Justin James | |
| JJ | Justin Jaynes | "The Guitar Hero" |
| JJ |
| Justin Jones |
| "Black Dynamite" |
| JL | Justin Lawrence | "The American Kidd" |
| JL | Justin Ledet | "El Blanco" |