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| J |
| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Jackson, Brit | MR | Seattle Sasquatch | 27 | 05/17/1988 | Bordentown | USA | Right | Right | 6' 0" | 199 lbs | $1,000,000 |
| Jackson, Charlie | 2B | San Diego Hops | 31 | 07/11/1984 | Grand Forks | USA | Right | Right | 5' 10" | 194 lbs | $2,500,000 |
| Jackson, Cody | MR | Washington Capitalists | 29 | 08/08/1986 | Sterling Heights | USA | Left | Right | 6' 0" | 211 lbs | $500,000 |
| Jackson, Gil | 2B | Carolina Crush | 23 | 02/10/1992 | Bronx | USA | Left | Right | 6' 1" | 195 lbs | $500,000 |
| Jackson, Greg | SP | The Georgia Grays | 26 | 08/17/1989 | Clarksville | USA | Right | Right | 6' 0" | 210 lbs | $500,000 |
| Jackson, Joe | MR | Free Agent | 29 | 07/10/1986 | Fargo | USA | Switch | Right | 5' 10" | 199 lbs | - |
| Jackson, Norm | SP | Boston Cardinals | 33 | 11/17/1982 | San Marcos | USA | Switch | Right | 5' 11" | 186 lbs | $11,250,000 |
| Jackson, Stephen | RF | South Carolina Bombers | 29 | 11/04/1986 | Los Angeles | USA | Left | Left | 6' 2" | 244 lbs | $3,000,000 |
| James, Steve | CF | Carolina Crush | 28 | 02/20/1987 | Avalon | USA | Left | Left | 6' 1" | 161 lbs | $500,000 |
| James, Travis | SP | Free Agent | 30 | 05/28/1985 | Bartow | USA | Left | Left | 6' 1" | 216 lbs | - |
| Jennings, Vic | 1B | Maple Marauders | 30 | 06/08/1985 | Grayslake | USA | Left | Right | 6' 0" | 206 lbs | $7,000,000 |
| Johnson, Barry | MR | Minnesota Berserkers | 38 | 03/28/1977 | Lafayette | USA | Right | Right | 6' 8" | 207 lbs | $5,500,000 |
| Johnson, Edgar | LF | Minnesota Berserkers | 33 | 09/25/1982 | St. Petersburg | USA | Right | Right | 6' 0" | 203 lbs | $12,800,000 |
| Johnson, Jack | 1B | Jersey Jesters | 28 | 10/28/1987 | Yucaipa | USA | Switch | Right | 5' 8" | 185 lbs | $3,200,000 |
| Johnson, Mike | LF | San Diego Hops | 32 | 11/07/1983 | Rockwood | USA | Left | Left | 6' 4" | 242 lbs | $9,000,000 |
| Johnson, Nick | 3B | Ann Arbor Barn Owls | 22 | 01/16/1993 | Ellwood City | USA | Left | Right | 5' 10" | 210 lbs | $500,000 |
| Johnson, Steve | MR | Minnesota Berserkers | 28 | 09/01/1987 | Daly City | USA | Right | Right | 6' 1" | 212 lbs | $1,500,000 |
| Johnson, Todd | MR | Ann Arbor Barn Owls | 24 | 09/12/1991 | Huntersville | USA | Left | Right | 6' 0" | 160 lbs | $500,000 |
| Johnston, Paul | SP | Dallas Texans | 24 | 09/25/1991 | Stamford | USA | Left | Left | 6' 0" | 210 lbs | $500,000 |
| Jones, John | 3B | Eureka Hornets | 22 | 11/04/1993 | Cleveland Heights | USA | Right | Right | 5' 11" | 185 lbs | - |
| Jones, Paul | MR | The Georgia Grays | 28 | 11/03/1987 | Wells | USA | Left | Right | 6' 3" | 225 lbs | $500,000 |
| Jouon, Keiji | MR | Minnesota Berserkers | 30 | 10/18/1985 | Hiroshima | JPN | Right | Right | 6' 0" | 185 lbs | $2,520,000 |
| Joyce, Mike | SP | San Diego Hops | 32 | 10/31/1983 | Gaithersburg | USA | Right | Right | 6' 5" | 197 lbs | $6,000,000 |
