Sorted alphabetically by last name · 2767 fighters
| Name | Nickname | |
|---|---|---|
| SE | Sijara Eubanks | "SarJ" |
| SG | Silvana Gomez Juarez | "La Malvada" |
| ST | Simeon Thoresen | "The Grin" |
| SL | Sione Latu | |
| SK | Sirwan Kakai | "Zohan" |
| SB | Siyar Bahadurzada | "The Great" |
| SP | Soa Palelei | "The Hulk" |
| SY |
| Sodiq Yusuff |
| "Super" |
| SM | Sofia Montenegro | "La Bruja" |
| SH | Solomon Hutcherson | "King" |