Sorted alphabetically by last name · 2707 fighters
| Name | Nickname | |
|---|---|---|
| SS | Sean Salmon | |
| SS | Sean Sharaf | "The Smoke" |
| SS | Sean Sherk | "The Muscle Shark" |
| SS | Sean Soriano | |
| SS | Sean Spencer | "Black Magic" |
| SS | Sean Strickland | |
| SW | Sean Woodson | "The Sniper" |
| SS | Sebastian Szalay | "Seb" |
| SD | Sedriques Dumas | "The Reaper" |
| SS | Semmy Schilt | "Hightower" |