Sorted alphabetically by last name · 2707 fighters
| Name | Nickname | |
|---|---|---|
| SK | Sirwan Kakai | "Zohan" |
| SB | Siyar Bahadurzada | "The Great" |
| SP | Soa Palelei | "The Hulk" |
| SY | Sodiq Yusuff | "Super" |
| SH | Solomon Hutcherson | "King" |
| SK | Song Kenan | "The Assassin" |
| SY | Song Yadong | "Kung Fu Kid" |
| SF | Spencer Fisher | "The King" |
| SC | Spike Carlyle | "Alpha Ginger" |
| SN | Stanislav Nedkov | "Stucky" |