| 12/31/2018 | ||||||
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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Sáenz, Luis | 3B | Surrey Sinners | 20 | 12/27/1998 | Guapiles | CRC | Right | Right | 5' 10" | 200 lbs | - |
| Salazar, José | SS | Jasper Cougars | 20 | 06/04/1998 | Madruga | CUB | Right | Right | 5' 11" | 185 lbs | - |
| Saldaña, Carlos | 2B | Surrey Sinners | 23 | 07/08/1995 | Santo Domingo | DOM | Right | Right | 6' 1" | 215 lbs | - |
| Saldaña, Juan | 3B | Jasper Cougars | 22 | 12/01/1996 | Sabaneta | DOM | Right | Left | 5' 9" | 165 lbs | - |
| Saltines, Raúl | MR | Salem Sledgehammers | 17 | 03/09/2001 | Santo Domingo | DOM | Right | Right | 6' 0" | 190 lbs | - |
| Sánchez, Armando | 2B | Surrey Sinners | 25 | 10/06/1993 | Bethlehem | USA | Right | Right | 6' 0" | 180 lbs | - |
| Sánchez, Daniel | 3B | Free Agent | 23 | 08/10/1995 | Las Yayas de Viajama | DOM | Switch | Right | 6' 0" | 220 lbs | - |
| Sánchez, Roberto | 2B | Colorado Commanders | 30 | 07/04/1988 | Niquero | CUB | Right | Right | 6' 1" | 218 lbs | - |
| Sandoval, Alberto | C | Jasper Cougars | 23 | 06/13/1995 | Santo Domingo | DOM | Right | Right | 5' 11" | 200 lbs | - |
| Sandoval, Francisco | 1B | Seattle Rainiers | 17 | 01/03/2001 | Paraíso | DOM | Right | Right | 5' 11" | 210 lbs | $750,000 |
| Santos, Ramón | MR | Lloydminster Lynx | 22 | 09/19/1996 | Fort Belvoir | USA | Left | Left | 6' 4" | 230 lbs | - |
| Savage, Bill | SS | Salem Sledgehammers | 20 | 05/21/1998 | West New York | USA | Right | Right | 6' 0" | 195 lbs | - |
| Schmidt, Steve | C | Free Agent | 25 | 05/28/1993 | Hempstead | USA | Left | Right | 6' 0" | 190 lbs | - |
| Scott, Joe | 3B | Salem Sledgehammers | 24 | 09/18/1994 | Menomonie | USA | Right | Right | 6' 2" | 205 lbs | - |
| Scott, Sherman | 2B | Colorado Commanders | 22 | 02/02/1996 | Apple Valley | USA | Left | Right | 6' 1" | 220 lbs | - |
| Seletto, Loïc | MR | Free Agent | 22 | 05/20/1996 | Erice | ITA | Right | Right | 6' 3" | 245 lbs | - |
| Shelton, Morton | MR | Jasper Cougars | 24 | 06/18/1994 | Knightdale | USA | Right | Right | 6' 1" | 225 lbs | - |
| Shinoda, Kiyomitsu | 1B | Lloydminster Lynx | 22 | 06/30/1996 | Tokyo | JPN | Right | Right | 6' 0" | 215 lbs | - |
| Silva, Manuel | SP | Colorado Commanders | 24 | 07/10/1994 | Myrtle Grove | USA | Right | Right | 6' 11" | 255 lbs | - |
| Sims, Wallace | MR | Surrey Sinners | 23 | 11/21/1995 | Amherst | USA | Left | Left | 6' 1" | 220 lbs | - |
| Solís, Júlio | MR | Free Agent | 26 | 10/11/1992 | General Pico | ARG | Right | Right | 6' 0" | 225 lbs | - |
| Soto, Felipe | 3B | Free Agent | 21 | 07/18/1997 | Pompano Beach | USA | Right | Right | 6' 2" | 220 lbs | - |
| Soto, Júlio | 1B | Saskatoon Smokin' Guns | 25 | 11/09/1993 | Constanza | DOM | Right | Right | 6' 2" | 200 lbs | - |
| Sousa, Luis | MR | Seattle Rainiers | 23 | 04/15/1995 | New York | USA | Right | Right | 5' 10" | 220 lbs | - |
| Spencer, Dale | SP | Surrey Sinners | 24 | 10/26/1994 | Inglewood | USA | Left | Left | 5' 10" | 205 lbs | - |
| Spencer, Ray | LF | Surrey Sinners | 21 | 09/14/1997 | Macomb | USA | Left | Left | 6' 0" | 195 lbs | - |
| Spurr, Derek | 3B | Surrey Sinners | 23 | 08/27/1995 | Victoria | CAN | Right | Right | 6' 0" | 185 lbs | - |
| Stabler, Mike | SP | Salem Sledgehammers | 23 | 07/20/1995 | Brooklyn | USA | Right | Right | 6' 3" | 215 lbs | - |
| Starks, Doug | SP | Colorado Commanders | 22 | 12/29/1996 | Canton | USA | Right | Left | 6' 0" | 205 lbs | - |
| Stephenson, Travis | SS | Surrey Sinners | 25 | 01/10/1993 | Huntington | USA | Switch | Right | 6' 0" | 205 lbs | - |
| Strickland, Quinn | MR | Lloydminster Lynx | 19 | 03/23/1999 | Olathe | USA | Right | Right | 6' 2" | 195 lbs | - |
