Sorted alphabetically by last name · 2707 fighters
| Name | Nickname | |
|---|---|---|
| SN | Stewart Nicoll | "Kakamora" |
| SM | Stipe Miocic | |
| SY | SuYoung You | "Yoo-Jitsu" |
| S | Sulangrangbo | |
| SA | Sultan Aliev | |
| SM | Suman Mokhtarian | |
| S | Sumudaerji | "The Tibetan Eagle" |
| SB | Sung Bin Jo | "Korean Falcon" |
| SK | Syuri Kondo | |
| TB | TJ Brown | "Downtown" |