| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Shunichi | Shimizu | 5' 5" | 135 lbs. | -- | Orthodox | 30 | 18 | 11 | ||
| Wade | Shipp | The Nightmare | 6' 3" | 245 lbs. | -- | Orthodox | 11 | 5 | 0 | |
| Raja | Shippen | 5' 6" | 145 lbs. | -- | 18 | 11 | 1 | |||
| Yuya | Shirai | 5' 8" | 168 lbs. | -- | Orthodox | 26 | 14 | 2 | ||
| Wes | Shivers | 6' 8" | -- | -- | 7 | 1 | 0 | |||
| Alexander | Shlemenko | Storm | 5' 11" | 185 lbs. | -- | 56 | 9 | 0 | ||
| Josh | Shockley | 6' 1" | 155 lbs. | -- | Orthodox | 11 | 4 | 0 | ||
| Josh | Shockman | The War Hammer | 6' 4" | 235 lbs. | -- | Southpaw | 6 | 3 | 0 | |
| Akira | Shoji | 5' 8" | 195 lbs. | -- | Orthodox | 14 | 17 | 5 | ||
| Liudvik | Sholinian | Palmeyros | 5' 10" | 135 lbs. | 71.0" | Orthodox | 9 | 4 | 1 | |
| Jack | Shore | Tank | 5' 8" | 145 lbs. | 71.0" | Orthodox | 17 | 3 | 0 | |
| Landon | Showalter | The Show | 6' 0" | 185 lbs. | -- | 11 | 19 | 1 | ||
| Ivan | Shtyrkov | Ural Hulk | 6' 0" | 205 lbs. | 74.0" | Orthodox | 15 | 0 | 1 | |
| Brandon | Shuey | Big Dawg | 5' 7" | 155 lbs. | -- | Orthodox | 7 | 6 | 0 | |
| Ronal | Siahaan | Naga Sakti | 5' 7" | 125 lbs. | 71.0" | Southpaw | 7 | 1 | 0 | |
| Sam | Sicilia | 5' 8" | 145 lbs. | 67.0" | Orthodox | 15 | 8 | 0 | ||
| Kiril | Sidelnikov | 5' 11" | 230 lbs. | -- | 11 | 4 | 0 | |||
| Serhiy | Sidey | 5' 11" | 135 lbs. | 72.0" | Switch | 11 | 2 | 0 | ||
| Steven | Siler | Super | 5' 11" | 145 lbs. | 70.0" | Orthodox | 29 | 16 | 0 | |
| Siala | Siliga | Mighty Mo | 6' 1" | 290 lbs. | -- | Orthodox | 12 | 5 | 0 | |
| Xavier | Siller | Young Guns | 5' 5" | 125 lbs. | -- | 5 | 5 | 0 | ||
| Assuerio | Silva | 5' 10" | 241 lbs. | -- | Orthodox | 16 | 8 | 0 | ||
| Anderson | Silva | The Spider | 6' 2" | 185 lbs. | 77.0" | Southpaw | 34 | 11 | 0 | |
| Wanderlei | Silva | The Axe Murderer | 5' 11" | 205 lbs. | 74.0" | Orthodox | 35 | 13 | 1 |