Sorted alphabetically by last name · 2767 fighters
| Name | Nickname | |
|---|---|---|
| SK | Song Kenan | "The Assassin" |
| SY | Song Yadong | "Kung Fu Kid" |
| SF | Spencer Fisher | "The King" |
| SC | Spike Carlyle | "Alpha Ginger" |
| SD | Stan Dorsainvil | "The Drill" |
| SN | Stanislav Nedkov | "Stucky" |
| SS | Stefan Sekulic | |
| SS |
| Stefan Struve |
| "Skyscraper" |
| SB | Stephan Bonnar | "The American Psycho" |
| SE | Stephanie Egger |