Sorted alphabetically by last name · 2715 fighters
| Name | Nickname | |
|---|---|---|
| IP | Igor Pokrajac | "The Duke" |
| IS | Igor Severino | |
| IZ | Igor Zinoviev | "Houdini" |
| IP | Ihor Potieria | "Duelist" |
| IV | Ike Villanueva | "Hurricane" |
| IA | Ikram Aliskerov | |
| IM | Ikuhisa Minowa | "Minowaman" |
| IA | Ildemar Alcantara | "Marajo" |
| IT | Ilia Topuria | "El Matador" |
| IS | Iliarde Santos |