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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Jackson, Bryan | SP | Wichita Wolverines | 22 | 02/14/1993 | Reno | USA | Right | Right | 5' 11" | 215 lbs | - |
| Jackson, Don | RF | Carson City Mustang | 24 | 06/22/1991 | Madison | USA | Left | Left | 6' 2" | 190 lbs | - |
| Jackson, Mike | SP | Sandy Springs Spartans | 25 | 04/30/1990 | Farmington | USA | Right | Right | 6' 1" | 195 lbs | - |
| Jacobson, Christian | 3B | Asheville Tourists | 27 | 04/15/1988 | South Gastonia | USA | Right | Right | 6' 1" | 220 lbs | - |
| James, Mark | MR | Free Agent | 28 | 04/02/1987 | Silverton | USA | Left | Left | 6' 3" | 189 lbs | - |
| Jefferson, Bruce | MR | Free Agent | 30 | 06/13/1985 | Chicago | USA | Right | Right | 6' 2" | 186 lbs | - |
| Jenkins, Marvin | RF | Spokane Bulldogs | 24 | 11/15/1991 | Dundee | USA | Switch | Left | 6' 2" | 190 lbs | - |
| Jenkins, Sylvester | C | San Antonio Storm Troopers | 24 | 02/26/1991 | Munster | USA | Left | Right | 6' 1" | 225 lbs | - |
| Jennings, Sidney | 2B | Frisco Rams | 24 | 04/22/1991 | Terramuggus | USA | Right | Right | 5' 11" | 185 lbs | - |
| Jiménez, David | 3B | Free Agent | 21 | 01/16/1994 | Barahona | DOM | Left | Right | 6' 1" | 205 lbs | - |
| Jiménez, Miguel | SP | Sandy Springs Spartans | 32 | 07/12/1983 | North Massapequa | USA | Right | Right | 6' 0" | 192 lbs | - |
| Johnson, Alex | 2B | Carson City Mustang | 25 | 10/13/1990 | Portsmouth | USA | Left | Right | 6' 1" | 215 lbs | - |
| Johnson, Ron | RF | Riverside Red Bulls | 24 | 12/14/1991 | Olympia | USA | Right | Left | 6' 0" | 185 lbs | - |
| Johnston, Dan | MR | Grand Haven Whitecaps | 25 | 11/18/1990 | Lincoln | USA | Right | Right | 6' 2" | 210 lbs | - |
| Johnston, Jason | MR | Carson City Mustang | 25 | 09/30/1990 | Happy Valley | USA | Left | Left | 6' 0" | 200 lbs | - |
| Johnston, Melvin | CF | Riverside Red Bulls | 24 | 09/07/1991 | Cooper City | USA | Left | Right | 6' 0" | 217 lbs | - |
| Johnston, Steve | SP | Frisco Rams | 25 | 06/20/1990 | Dedham | USA | Left | Right | 6' 3" | 218 lbs | - |
| Johnston, Wes | CL | Murfreesboro Deacons | 23 | 02/07/1992 | Burien | USA | Switch | Right | 6' 0" | 220 lbs | - |
| Jones, David | LF | Murfreesboro Deacons | 30 | 11/04/1985 | Sterling | USA | Right | Right | 6' 2" | 208 lbs | - |
| Jones, Gerald | MR | Free Agent | 22 | 11/19/1993 | McFarland | USA | Right | Right | 6' 0" | 230 lbs | - |
| Jones, Mike | SP | Anniston Cougars | 27 | 10/05/1988 | Clinton | USA | Right | Right | 6' 2" | 207 lbs | - |
| Jones, Peter | RF | Murfreesboro Deacons | 23 | 07/03/1992 | Powder Springs | USA | Right | Right | 6' 1" | 175 lbs | - |
| Jones, Spike | LF | Free Agent | 29 | 10/10/1986 | Hays | USA | Right | Right | 6' 3" | 230 lbs | - |
| Jones, Tommy | MR | Anniston Cougars | 22 | 11/27/1993 | Westland | USA | Right | Right | 6' 0" | 215 lbs | - |
| Joyce, Mike | MR | Long Island Ducks | 25 | 07/16/1990 | Copperopolis | USA | Right | Right | 6' 3" | 205 lbs | - |
