| 12/31/2018 | ||||||
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| J |
| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Jackson, Ernie | SS | West Virginia Power | 24 | 08/08/1994 | Cary | USA | Left | Right | 6' 1" | 210 lbs | - |
| Jackson, Robert | MR | Free Agent | 29 | 01/09/1989 | La Grange Park | USA | Right | Right | 6' 2" | 205 lbs | - |
| James, Jeff | LF | Key West Barracudas | 29 | 06/20/1989 | Cornelius | USA | Left | Left | 6' 0" | 198 lbs | - |
| Jennings, Steve | LF | Gainesville Guidos | 23 | 06/26/1995 | Harbison Canyon | USA | Right | Right | 6' 3" | 160 lbs | - |
| Jiménez, Pepe | RF | BlackIron Dragons | 31 | 11/21/1987 | Santiago | CHI | Right | Right | 6' 0" | 178 lbs | - |
| John, Clint | SP | New Hampshire Fisher Cats | 21 | 08/29/1997 | Versailles | USA | Switch | Right | 6' 0" | 255 lbs | - |
| Johnson, Earnest | MR | Santa Fe Diablos | 26 | 01/22/1992 | Austin | USA | Right | Right | 6' 1" | 220 lbs | - |
| Jones, Ed | SP | Key West Barracudas | 24 | 11/06/1994 | Milliken | USA | Right | Right | 5' 8" | 210 lbs | - |
| Jones, Mathew | 3B | West Palm Reds | 31 | 11/03/1987 | New York | USA | Right | Right | 6' 2" | 207 lbs | - |
| Jost, George | CF | West Palm Reds | 24 | 06/16/1994 | Toronto | CAN | Right | Right | 5' 8" | 185 lbs | - |
