| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Chael | Sonnen | 6' 1" | 205 lbs. | 73.0" | Southpaw | 29 | 15 | 1 | ||
| Cody | Sons | 5' 9" | 205 lbs. | -- | 3 | 7 | 0 | |||
| Jin | Soo Son | 5' 6" | 135 lbs. | 69.0" | Orthodox | 9 | 4 | 0 | ||
| Benardo | Sopaj | Lion King | 5' 6" | 135 lbs. | 66.0" | Orthodox | 11 | 3 | 0 | |
| Emiliano | Sordi | He-Man | 6' 2" | 205 lbs. | -- | Orthodox | 16 | 7 | 0 | |
| Sean | Soriano | 5' 9" | 145 lbs. | 70.0" | Orthodox | 14 | 8 | 0 | ||
| Punahele | Soriano | Puna | 5' 11" | 170 lbs. | 72.0" | Southpaw | 10 | 4 | 0 | |
| Dmitry | Sosnovskiy | Wicked Machine | 6' 3" | 240 lbs. | 77.0" | Orthodox | 11 | 0 | 0 | |
| Ben | Sosoli | Combat Wombat | 6' 0" | 265 lbs. | 72.0" | Southpaw | 7 | 3 | 0 | |
| Krzysztof | Soszynski | The Polish Experiment | 6' 1" | 205 lbs. | 77.0" | Open Stance | 26 | 12 | 1 | |
| George | Sotiropoulos | 5' 10" | 155 lbs. | 71.0" | Orthodox | 14 | 7 | 0 | ||
| Greg | Soto | 5' 11" | 170 lbs. | 73.0" | Orthodox | 9 | 4 | 0 | ||
| Alex | Soto | Extremo | 5' 8" | 135 lbs. | -- | Southpaw | 8 | 3 | 1 | |
| Joe | Soto | One Bad Mofo | 5' 6" | 135 lbs. | 65.0" | Orthodox | 18 | 7 | 0 | |
| Mario | Soto | Dr. Mario | 6' 0" | 145 lbs. | -- | 7 | 2 | 0 | ||
| Andre | Soukhamthath | The Asian Sensation | 5' 9" | 135 lbs. | 70.0" | Orthodox | 13 | 8 | 0 | |
| Mario | Sousa | Coracao Valente | 6' 3" | 185 lbs. | 79.0" | Orthodox | 15 | 3 | 0 | |
| Bobby | Southworth | 6' 2" | 205 lbs. | -- | Orthodox | 10 | 6 | 0 | ||
| Jacare | Souza | 6' 1" | 185 lbs. | 72.0" | Orthodox | 26 | 10 | 0 | ||
| Edimilson | Souza | Kevin | 6' 0" | 145 lbs. | 74.0" | Orthodox | 15 | 5 | 0 | |
| Livinha | Souza | The Brazilian Gangsta | 5' 3" | 115 lbs. | 63.0" | Orthodox | 14 | 4 | 0 | |
| Bruno | Souza | The Tiger | 5' 10" | 145 lbs. | 70.0" | Orthodox | 10 | 3 | 0 | |
| Ketlen | Souza | Esquentadinha | 5' 3" | 115 lbs. | 63.0" | Orthodox | 15 | 4 | 0 | |
| Heraldo | Souza | Savage | 5' 11" | 185 lbs. | 73.0" | Orthodox | 9 | 2 | 1 |