| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Daniel | Sarafian | 5' 9" | 185 lbs. | 73.0" | Orthodox | 10 | 6 | 0 | ||
| Diego | Saraiva | The Octopus | 5' 6" | 155 lbs. | -- | Orthodox | 22 | 20 | 1 | |
| Harris | Sarmiento | The Hitman | 5' 9" | 155 lbs. | -- | Orthodox | 36 | 26 | 0 | |
| Alexander | Sarnavskiy | Tiger | 5' 11" | 155 lbs. | -- | 35 | 6 | 0 | ||
| Yuki | Sasaki | 6' 2" | 185 lbs. | -- | Orthodox | 25 | 22 | 2 | ||
| Kyosuke | Sasaki | 5' 7" | 183 lbs. | -- | Southpaw | 3 | 7 | 4 | ||
| Yuta | Sasaki | Ulka | 5' 10" | 125 lbs. | 71.0" | Southpaw | 21 | 6 | 2 | |
| Paul | Sass | 6' 0" | 155 lbs. | 73.0" | Orthodox | 14 | 2 | 0 | ||
| Masaaki | Satake | 6' 1" | 220 lbs. | -- | Orthodox | 1 | 8 | 1 | ||
| Takenori | Sato | 5' 10" | 170 lbs. | -- | Southpaw | 19 | 11 | 7 | ||
| Takashi | Sato | Ten | 5' 10" | 170 lbs. | 73.0" | Southpaw | 16 | 3 | 0 | |
| Jeimeson | Saudino | The Minion | 5' 6" | 135 lbs. | -- | 8 | 5 | 0 | ||
| Tom | Sauer | 6' 1" | 263 lbs. | -- | 25 | 12 | 0 | |||
| Townsend | Saunders | 5' 5" | 170 lbs. | -- | Orthodox | 0 | 2 | 0 | ||
| Ben | Saunders | Killa B | 6' 2" | 170 lbs. | 77.0" | Orthodox | 22 | 13 | 2 | |
| Chad W. | Saunders | 5' 10" | 170 lbs. | -- | Orthodox | 7 | 2 | 0 | ||
| Chris | Saunders | The So Cal Kid | 5' 8" | 155 lbs. | -- | 16 | 8 | 0 | ||
| Lumumba | Sayers | 6' 0" | 185 lbs. | -- | 6 | 5 | 0 | |||
| Matt | Sayles | 5' 7" | 145 lbs. | 68.0" | Orthodox | 8 | 3 | 0 | ||
| Mark | Scanlon | 5' 9" | 170 lbs. | -- | Orthodox | 9 | 2 | 0 | ||
| Eric | Schafer | Red | 6' 3" | 185 lbs. | 76.0" | Orthodox | 14 | 8 | 2 | |
| Kerry | Schall | Meat Truck | 6' 2" | 265 lbs. | -- | Orthodox | 24 | 13 | 0 | |
| Eric | Schambari | 5' 11" | 185 lbs. | -- | Orthodox | 15 | 6 | 0 | ||
| Brendan | Schaub | Big Brown | 6' 4" | 245 lbs. | 78.0" | Orthodox | 10 | 5 | 0 |