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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Jackson, Cody | MR | Prussian Marxists | 30 | 08/08/1986 | Sterling Heights | USA | Left | Right | 6' 0" | 215 lbs | - |
| Jackson, Don | RF | Carson City Mustang | 25 | 06/22/1991 | Madison | USA | Left | Left | 6' 2" | 190 lbs | - |
| Jacobs, John | CF | New York Ninjas | 25 | 01/11/1991 | New York | USA | Right | Right | 6' 3" | 227 lbs | - |
| Jacobson, Christian | 3B | Asheville Tourists | 28 | 04/15/1988 | South Gastonia | USA | Right | Right | 6' 1" | 218 lbs | - |
| Jacobson, Nick | C | Blackpool Gamblers | 24 | 06/02/1992 | Ypsilanti | USA | Left | Right | 6' 3" | 215 lbs | - |
| James, Jeffery | MR | Silicon Valley Hackers | 24 | 11/28/1992 | Fargo | USA | Right | Right | 5' 10" | 215 lbs | - |
| James, John | MR | Murfreesboro Deacons | 29 | 03/21/1987 | St. Clair Shores | USA | Right | Right | 6' 1" | 188 lbs | - |
| Jefferson, Bruce | MR | Free Agent | 31 | 06/13/1985 | Chicago | USA | Right | Right | 6' 2" | 188 lbs | - |
| Jenkins, Sylvester | C | San Antonio Storm Troopers | 25 | 02/26/1991 | Munster | USA | Left | Right | 6' 1" | 225 lbs | - |
| Jennings, Phil | 2B | Silicon Valley Hackers | 24 | 12/24/1992 | Las Vegas | USA | Right | Right | 6' 3" | 190 lbs | - |
| Jennings, Sidney | 2B | Free Agent | 25 | 04/22/1991 | Terramuggus | USA | Right | Right | 5' 11" | 185 lbs | - |
| Jiménez, Miguel | SP | Free Agent | 33 | 07/12/1983 | North Massapequa | USA | Right | Right | 6' 0" | 190 lbs | - |
| Joe, Hai-dong | 3B | Jacksonville Hellcats | 19 | 09/05/1997 | Salisbury | CAN | Right | Right | 5' 8" | 180 lbs | - |
| Johnson, Dave | CF | Murfreesboro Deacons | 22 | 08/30/1994 | Irvine | USA | Left | Right | 6' 5" | 225 lbs | - |
| Johnson, Ron | CF | Riverside Red Bulls | 25 | 12/14/1991 | Olympia | USA | Right | Left | 6' 0" | 185 lbs | - |
| Johnston, Jason | MR | Carson City Mustang | 26 | 09/30/1990 | Happy Valley | USA | Left | Left | 6' 0" | 200 lbs | - |
| Johnston, Melvin | CF | Free Agent | 25 | 09/07/1991 | Cooper City | USA | Left | Right | 6' 0" | 217 lbs | - |
| Johnston, Tom | 1B | Anniston Cougars | 24 | 11/12/1992 | Troy | USA | Switch | Right | 6' 0" | 170 lbs | - |
| Johnston, Wes | MR | Murfreesboro Deacons | 24 | 02/07/1992 | Burien | USA | Switch | Right | 6' 0" | 222 lbs | - |
| Jones, Adrian | LF | Carson City Mustang | 28 | 12/14/1988 | Winters | USA | Right | Right | 6' 2" | 182 lbs | - |
| Jones, Alex | MR | Phoenix Lights | 25 | 05/01/1991 | Fairview | USA | Right | Right | 6' 4" | 195 lbs | - |
| Jones, David | 1B | Free Agent | 31 | 11/04/1985 | Sterling | USA | Right | Right | 6' 2" | 210 lbs | - |
| Jones, Mike | SP | Anniston Cougars | 28 | 10/05/1988 | Clinton | USA | Right | Right | 6' 2" | 207 lbs | - |
| Jones, Nick | MR | Free Agent | 31 | 01/22/1985 | Chicago | USA | Left | Left | 6' 1" | 207 lbs | - |
| Jones, Paul | MR | Sandy Springs Spartans | 29 | 11/03/1987 | Wells | USA | Left | Right | 6' 3" | 219 lbs | - |
| Jones, Peter | RF | Murfreesboro Deacons | 24 | 07/03/1992 | Powder Springs | USA | Right | Right | 6' 1" | 175 lbs | - |
| Jones, Spike | LF | Free Agent | 30 | 10/10/1986 | Hays | USA | Right | Right | 6' 3" | 228 lbs | - |
| Jones, Tommy | MR | Anniston Cougars | 23 | 11/27/1993 | Westland | USA | Right | Right | 6' 0" | 215 lbs | - |
| Jones, William | CF | Lake of the Isles Wolves | 30 | 02/18/1986 | Brooklyn | USA | Left | Left | 5' 11" | 178 lbs | - |
| Joseph, Chris | 1B | Grand Haven Whitecaps | 23 | 05/20/1993 | Stoughton | USA | Left | Left | 6' 0" | 205 lbs | - |
| Joseph, Stephen | MR | Sandy Springs Spartans | 26 | 08/16/1990 | New York | USA | Right | Right | 6' 0" | 205 lbs | - |
| Juárez, Juan | 3B | Free Agent | 34 | 05/31/1982 | Santiago de Cuba | CUB | Right | Right | 6' 2" | 221 lbs | - |
