| 12/31/2018 | ||||||
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| S |
| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Salas, Iván | RF | Dunedin Blue Jays | 25 | 02/16/1993 | Smithfield | USA | Left | Left | 6' 3" | 205 lbs | - |
| Salazar, Félix | MR | Free Agent | 22 | 01/24/1996 | San Cristóbal | DOM | Right | Right | 6' 5" | 235 lbs | - |
| Salgado, José | 3B | Free Agent | 26 | 07/18/1992 | San Francisco | USA | Right | Right | 6' 1" | 194 lbs | - |
| Salinas, César | 1B | Free Agent | 24 | 09/22/1994 | Barcelona | VEN | Left | Left | 6' 7" | 205 lbs | - |
| Sánchez, Esteban | 3B | Athens Assassins | 26 | 11/25/1992 | Ocumare del Tuy | VEN | Switch | Right | 6' 1" | 216 lbs | - |
| Sánchez, José | 1B | Tolland Singrays | 21 | 08/28/1997 | Rancho Cordova | USA | Right | Right | 6' 0" | 205 lbs | - |
| Sánchez, Ramón | RF | Louisville Rockets | 29 | 01/19/1989 | Havana | CUB | Right | Right | 6' 3" | 189 lbs | - |
| Sanders, Mark | SP | State College Spikes | 24 | 10/20/1994 | Worcester | USA | Switch | Right | 6' 3" | 260 lbs | - |
| Sanders, Richard | 2B | Nantucket Orcas | 19 | 06/28/1999 | Forestville | USA | Right | Right | 6' 4" | 195 lbs | - |
| Sandoval, Ramón | SS | Louisville Rockets | 19 | 06/24/1999 | Fresno | USA | Right | Right | 6' 2" | 200 lbs | - |
| Santana, Pedro | SP | Nantucket Orcas | 23 | 03/24/1995 | Oldsmar | USA | Left | Left | 6' 1" | 220 lbs | - |
| Sasaki, Toyokazu | MR | Athens Assassins | 22 | 07/13/1996 | Oyabe | JPN | Left | Left | 6' 1" | 220 lbs | - |
| Savage, Anthony | SS | Free Agent | 22 | 11/17/1996 | Lanham-Seabrook | USA | Left | Right | 6' 1" | 165 lbs | - |
| Schultz, Michael | MR | Nantucket Orcas | 24 | 08/23/1994 | Cincinnati | USA | Right | Right | 6' 1" | 215 lbs | - |
| Serrano, Roberto | SP | Louisville Rockets | 27 | 02/27/1991 | San Juan de la Maguana | DOM | Switch | Right | 5' 9" | 198 lbs | - |
| Shaffer, Francis | 3B | Louisville Rockets | 19 | 02/12/1999 | Detroit | USA | Switch | Right | 6' 0" | 200 lbs | - |
| Simons, Eddie | MR | Free Agent | 26 | 10/13/1992 | Bogalusa | USA | Right | Right | 6' 0" | 225 lbs | - |
| Smith, Ken | LF | Athens Assassins | 23 | 09/14/1995 | Warwick | USA | Left | Left | 5' 9" | 185 lbs | - |
| Smith, Matt | 3B | Pensacola Pilots | 19 | 04/30/1999 | Richmond | USA | Left | Right | 6' 1" | 190 lbs | - |
| Smith, Ryan | 1B | Nantucket Orcas | 24 | 10/19/1994 | New York | USA | Switch | Right | 6' 2" | 199 lbs | - |
| Snyder, Mal | 1B | Athens Assassins | 25 | 11/09/1993 | New York | USA | Right | Right | 6' 3" | 195 lbs | - |
| Snyder, William | SP | Free Agent | 36 | 10/28/1982 | San Marcos | USA | Right | Right | 5' 8" | 194 lbs | - |
| Soto, Francisco | RF | Free Agent | 36 | 11/07/1982 | Broken Arrow | USA | Left | Left | 6' 2" | 205 lbs | - |
| Soto, Raúl | RF | Myrtle Beach Waves | 20 | 03/03/1998 | Enid | USA | Right | Right | 6' 0" | 180 lbs | - |
| Spencer, Kendrick | SP | Tolland Singrays | 21 | 12/05/1997 | Eagleville | USA | Left | Left | 6' 3" | 220 lbs | - |
| Stewart, Theodore | MR | Louisville Rockets | 27 | 02/15/1991 | Milpitas | USA | Left | Left | 6' 1" | 190 lbs | - |
| Stroud, Benjamin | SP | Louisville Rockets | 24 | 03/07/1994 | Brooklyn | USA | Left | Left | 6' 2" | 220 lbs | - |
| Sullivan, Chris | CL | Louisville Rockets | 29 | 04/18/1989 | Statesville | USA | Right | Right | 5' 10" | 207 lbs | - |
| Sumita, Yasuhiko | C | Nashua Redlegs | 18 | 04/08/2000 | Tokyo | JPN | Right | Right | 5' 10" | 205 lbs | - |
