Sorted alphabetically by last name · 2780 fighters
| Name | Nickname | |
|---|---|---|
| SS | Sam Stout | "Hands of Stone" |
| SM | Sammy Morgan | "The Squeeze" |
| SS | Samy Schiavo | |
| SK | Sanae Kikuta | |
| SK | Sangwook Kim | "Frogman" |
| SL | Santiago Luna | "BorderBoy" |
| SP | Santiago Ponzinibbio | "Argentine Dagger" |
| SS |
| Saparbeg Safarov |
| SM | Sara McMann |
| SA | Sarah Alpar | "Too Sweet" |