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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Abrams, Max | LF | Free Agent | 32 | 12/05/1984 | Colrain | USA | Right | Right | 6' 5" | 214 lbs | - |
| Adams, Holden | RF | New York Mafia | 29 | 12/22/1987 | Bloomfield | USA | Left | Left | 6' 2" | 190 lbs | $4,800,000 |
| Adams, Jason | SP | South Carolina Bombers | 24 | 07/21/1992 | Deltona | USA | Right | Right | 6' 2" | 220 lbs | $500,000 |
| Afendulov, Alek | 1B | San Francisco Earthquakes | 25 | 04/10/1991 | Vancouver | USA | Right | Right | 6' 4" | 220 lbs | $500,000 |
| Aguirre, António | MR | Carolina Crush | 25 | 08/27/1991 | Columbus | USA | Right | Right | 6' 0" | 205 lbs | $900,000 |
| Akers, Brennan | 2B | Washington Capitalists | 33 | 02/05/1983 | Mountain View | USA | Right | Right | 6' 3" | 195 lbs | $1,400,000 |
| Allen, Anthony | MR | Jersey Jesters | 28 | 10/30/1988 | Vancouver | USA | Left | Left | 6' 3" | 200 lbs | $500,000 |
| Allen, Dan | RF | Montreal Bandits | 27 | 11/26/1989 | Williamsburg | USA | Right | Right | 6' 3" | 213 lbs | $500,000 |
| Allen, Geoff | MR | Free Agent | 37 | 07/04/1979 | Red Oak | USA | Left | Right | 6' 5" | 226 lbs | - |
| Amano, Kiichi | 1B | Seattle Sasquatch | 22 | 06/18/1994 | Tokyo | JPN | Switch | Right | 6' 1" | 200 lbs | - |
| Amore, Vasco | CL | Eureka Hornets | 24 | 04/10/1992 | Los Teques | VEN | Left | Right | 6' 0" | 210 lbs | $500,000 |
| Anderson, Brad | SP | Free Agent | 30 | 03/12/1986 | Iron Mountain | USA | Left | Left | 6' 5" | 207 lbs | - |
| Ando, Matsuo | LF | Free Agent | 19 | 04/24/1997 | Yokohama | JPN | Left | Left | 6' 0" | 190 lbs | - |
| Andrews, Scott | 3B | Jacksonville Jacks | 37 | 05/11/1979 | North Bergen | USA | Left | Right | 5' 11" | 215 lbs | $17,000,000 |
| Aragón, Armando | SP | Free Agent | 33 | 08/12/1983 | San Miguelito | PAN | Right | Right | 6' 0" | 174 lbs | - |
| Aravidze, Sabutai | MR | Washington Capitalists | 31 | 02/26/1985 | Akron | USA | Left | Left | 6' 1" | 197 lbs | $900,000 |
| Armstrong, Mike | CF | The Georgia Grays | 26 | 12/11/1990 | Keizer | USA | Left | Left | 5' 11" | 196 lbs | $500,000 |
| Armstrong, Rodney | SP | Kansas City Tornadoes | 25 | 09/21/1991 | Donna | USA | Left | Left | 6' 2" | 232 lbs | $5,150,000 |
| Arnason, Brian | MR | Jersey Jesters | 29 | 09/30/1987 | Honolulu | USA | Right | Right | 6' 0" | 206 lbs | $500,000 |
| Arnold, Ian | 2B | Cabo San Lucas Toreros | 27 | 01/13/1989 | Philadelphia | USA | Right | Right | 5' 9" | 187 lbs | $500,000 |
| Arnold, Lyle | CL | New York Mafia | 37 | 03/13/1979 | Washington | USA | Right | Right | 6' 1" | 208 lbs | $9,000,000 |
| Arnold, Robert | MR | Ann Arbor Barn Owls | 24 | 12/24/1992 | Salt Lake City | USA | Right | Right | 7' 0" | 230 lbs | $500,000 |
| Atkinson, Anthony | SP | Eureka Hornets | 23 | 10/31/1993 | Lady Lake | USA | Right | Right | 6' 3" | 220 lbs | $7,000,000 |
| Au, Li-chi | CF | Montreal Bandits | 26 | 07/07/1990 | Sunderland | USA | Left | Left | 6' 1" | 190 lbs | $500,000 |
| Avilés, Diego | MR | Nottinghamshire Outlaws | 27 | 10/26/1989 | Santo Domingo | DOM | Right | Right | 6' 4" | 212 lbs | $1,000,000 |
