| First | Last | Nickname | Ht. | Wt. | Reach | Stance | W | L | D | Belt |
|---|---|---|---|---|---|---|---|---|---|---|
| Lodune | Sincaid | 5' 9" | 185 lbs. | -- | Orthodox | 15 | 9 | 0 | ||
| Rob | Sinclair | 5' 8" | 155 lbs. | -- | 13 | 5 | 0 | |||
| Rory | Singer | Outburst | 6' 2" | 185 lbs. | 77.0" | Orthodox | 11 | 9 | 0 | |
| Rana Rudra Pratap | Singh | Ashwathama | 5' 10" | 135 lbs. | 69.0" | Orthodox | 11 | 2 | 0 | |
| Elvis | Sinosic | The King of Rock n' Rumble | 6' 3" | 205 lbs. | 77.0" | Orthodox | 7 | 11 | 2 | |
| Mitchell | Sipe | No Dice | 6' 2" | 245 lbs. | -- | Orthodox | 4 | 1 | 0 | |
| Gian | Siqueira | Pitbull | 6' 1" | 170 lbs. | 74.0" | Orthodox | 19 | 5 | 0 | |
| Jeremia | Siregar | The Teacher | 5' 2" | 125 lbs. | 63.0" | Orthodox | 6 | 3 | 0 | |
| AJ | Siscoe | Let's Go | 5' 7" | 135 lbs. | -- | 1 | 2 | 0 | ||
| Yokthai | Sithoar | 5' 7" | 143 lbs. | -- | 0 | 1 | 0 | |||
| Jeri | Sitzes | 5' 5" | 125 lbs. | -- | 3 | 1 | 0 | |||
| Dennis | Siver | 5' 6" | 145 lbs. | 70.0" | Orthodox | 23 | 11 | 0 | ||
| Chas | Skelly | The Scrapper | 5' 11" | 145 lbs. | 72.0" | Orthodox | 19 | 3 | 0 | |
| Matt | Skelton | 6' 3" | 265 lbs. | -- | Orthodox | 0 | 1 | 0 | ||
| Zach | Skinner | 5' 6" | 145 lbs. | -- | Orthodox | 10 | 11 | 0 | ||
| Brian | Sleeman | 5' 8" | 185 lbs. | -- | 9 | 9 | 1 | |||
| Joe | Slick | 6' 0" | 199 lbs. | -- | Orthodox | 16 | 5 | 3 | ||
| Ray | Sloan | 6' 1" | 205 lbs. | -- | 8 | 1 | 0 | |||
| Kestutis | Smirnovas | 5' 10" | 200 lbs. | -- | Orthodox | 24 | 8 | 2 | ||
| Maurice | Smith | 6' 2" | 221 lbs. | -- | Orthodox | 12 | 14 | 0 | ||
| Patrick | Smith | 6' 2" | 225 lbs. | -- | Orthodox | 20 | 17 | 0 | ||
| Scott | Smith | Hands of Steel | 6' 0" | 185 lbs. | 70.0" | Orthodox | 18 | 11 | 0 | |
| Eric | Smith | -- | -- | -- | Southpaw | 1 | 1 | 0 | ||
| Josh | Smith | 6' 0" | 155 lbs. | -- | Orthodox | 9 | 8 | 0 |