Sorted alphabetically by last name · 2715 fighters
| Name | Nickname | |
|---|---|---|
| IJ | Ivan Jorge | "Batman" |
| IM | Ivan Menjivar | "The Pride of El Salvador" |
| IS | Ivan Salaverry | |
| IS | Ivan Serati | |
| IP | Ivana Petrovic | |
| IB | Iwo Baraniewski | "Rudy" |
| IB | Izabela Badurek | |
| JC | JC Cottrell | |
| JA | JJ Aldrich | |
| JB | JP Buys | "Young Savage" |