Sorted alphabetically by last name · 2765 fighters
| Name | Nickname | |
|---|---|---|
| AO | Alistair Overeem | "The Demolition Man" |
| AS | Aljamain Sterling | "Funk Master" |
| AG | Allan Goes | |
| AN | Allan Nascimento | "Puro Osso" |
| AZ | Allan Zuniga | "Tigre" |
| AB | Allen Berube | "Monstah Lobstah" |
| AC | Allen Crowder | "Pretty Boy" |
| AF |
| Allen Frye Jr. |
| AM | Alonzo Menifield | "Atomic" |
| AO | Alptekin Ozkilic | "The Turkish Delight" |