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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Jackson, Dave | SS | Free Agent | 27 | 11/08/1987 | Los Angeles | USA | Right | Right | 6' 0" | 195 lbs | - |
| Jackson, David | RF | Free Agent | 28 | 09/11/1986 | Clearwater | USA | Left | Left | 6' 0" | 208 lbs | - |
| Jackson, Don | RF | Carson City Mustang | 23 | 06/22/1991 | Madison | USA | Left | Left | 6' 2" | 190 lbs | - |
| Jackson, Mike | SP | Sandy Springs Spartans | 24 | 04/30/1990 | Farmington | USA | Right | Right | 6' 1" | 195 lbs | - |
| James, Mark | MR | Free Agent | 27 | 04/02/1987 | Silverton | USA | Left | Left | 6' 3" | 187 lbs | - |
| Jaramillo, José | 3B | Newark Jail Birds | 24 | 07/13/1990 | Green Bay | USA | Right | Right | 6' 0" | 195 lbs | - |
| Jenkins, Christian | RF | Free Agent | 27 | 10/06/1987 | Liberty Lake | USA | Left | Left | 6' 3" | 220 lbs | - |
| Jenkins, Howard | MR | Carson City Mustang | 25 | 06/02/1989 | Hunter's Creek | USA | Left | Left | 6' 0" | 195 lbs | - |
| Jennings, Sidney | 2B | Frisco Rams | 23 | 04/22/1991 | Terramuggus | USA | Right | Right | 5' 11" | 185 lbs | - |
| Jiménez, David | 3B | Free Agent | 20 | 01/16/1994 | Barahona | DOM | Left | Right | 6' 1" | 205 lbs | - |
| Johns, Ben | C | Rock River Rats | 25 | 06/19/1989 | Murrieta | USA | Right | Right | 5' 11" | 219 lbs | - |
| Johnson, Alex | 2B | Carson City Mustang | 24 | 10/13/1990 | Portsmouth | USA | Left | Right | 6' 1" | 215 lbs | - |
| Johnson, Chris | SP | Free Agent | 33 | 06/06/1981 | Brooklyn | USA | Right | Right | 6' 0" | 227 lbs | - |
| Johnson, Ed | SS | Riverside Red Bulls | 26 | 06/27/1988 | Ft. Collins | USA | Right | Right | 6' 0" | 200 lbs | - |
| Johnson, Lance | RF | Riverside Red Bulls | 29 | 09/21/1985 | New York | USA | Right | Right | 6' 1" | 193 lbs | - |
| Johnston, Jason | CL | Carson City Mustang | 24 | 09/30/1990 | Happy Valley | USA | Left | Left | 6' 0" | 200 lbs | - |
| Johnston, Melvin | CF | Riverside Red Bulls | 23 | 09/07/1991 | Cooper City | USA | Left | Right | 6' 0" | 215 lbs | - |
| Johnston, Scott | SP | Phoenix Lights | 24 | 07/13/1990 | Arlington | USA | Right | Right | 6' 4" | 215 lbs | - |
| Johnston, Steve | SP | Frisco Rams | 24 | 06/20/1990 | Dedham | USA | Left | Right | 6' 3" | 218 lbs | - |
| Jones, Alex | MR | Phoenix Lights | 23 | 05/01/1991 | Fairview | USA | Right | Right | 6' 4" | 195 lbs | - |
| Jones, Ben | MR | Free Agent | 28 | 05/03/1986 | Siloam Springs | USA | Right | Right | 6' 1" | 210 lbs | - |
| Jones, Gerald | MR | Free Agent | 21 | 11/19/1993 | McFarland | USA | Right | Right | 6' 0" | 230 lbs | - |
| Jones, John | 3B | Madison Beehive | 21 | 11/04/1993 | Cleveland Heights | USA | Right | Right | 5' 11" | 185 lbs | - |
| Jones, Mike | MR | New York Ninjas | 22 | 10/27/1992 | Nebraska City | USA | Right | Right | 6' 4" | 220 lbs | - |
| Jones, Mike | SP | Anniston Cougars | 26 | 10/05/1988 | Clinton | USA | Right | Right | 6' 2" | 205 lbs | - |
| Jones, Spike | LF | New York Ninjas | 28 | 10/10/1986 | Hays | USA | Right | Right | 6' 3" | 230 lbs | - |
| Jones, Tommy | MR | Anniston Cougars | 21 | 11/27/1993 | Westland | USA | Right | Right | 6' 0" | 215 lbs | - |
| Joseph, Millard | CL | Long Island Ducks | 23 | 06/15/1991 | Claremore | USA | Right | Right | 5' 11" | 180 lbs | - |
| Joyce, Mike | MR | Long Island Ducks | 24 | 07/16/1990 | Copperopolis | USA | Right | Right | 6' 3" | 205 lbs | - |
| Juárez, Raúl | MR | New York Ninjas | 24 | 02/02/1990 | El Dorado | USA | Right | Right | 5' 8" | 205 lbs | - |
