| 12/31/2018 | ||||||
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| J |
| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Jackson, Grant | MR | Balzac Rams | 23 | 12/28/1995 | Manhattan | USA | Right | Right | 6' 4" | 220 lbs | - |
| James, Josh | MR | Free Agent | 25 | 06/11/1993 | Rockford | USA | Right | Right | 5' 9" | 200 lbs | - |
| Jensen, Michael | 2B | Free Agent | 31 | 07/22/1987 | Detroit | USA | Right | Right | 6' 2" | 172 lbs | - |
| Jones, Scott | LF | Balzac Rams | 30 | 03/23/1988 | Berne | USA | Left | Left | 6' 1" | 237 lbs | - |
| Juárez, José | SP | Riverside Red Bulls | 25 | 03/15/1993 | Roanoke | USA | Left | Right | 6' 5" | 245 lbs | - |
| Juárez, Júlio | SP | Menlo Maniacs | 24 | 12/12/1994 | San Antonio de los Baños | CUB | Right | Right | 6' 1" | 187 lbs | - |
