| 12/31/2018 | ||||||
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| J |
| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Jacobson, Lorne | C | Bemidji Benders | 23 | 06/14/1995 | Sandusky | USA | Right | Right | 6' 0" | 190 lbs | - |
| Jiménez, Álex | MR | Free Agent | 23 | 08/25/1995 | Nezahualczyotl | MEX | Right | Right | 6' 0" | 230 lbs | - |
| Jiménez, Ernesto | 3B | Lee's Summit Tigers | 25 | 08/10/1993 | Dennis | USA | Right | Right | 5' 11" | 215 lbs | - |
| Jiménez, Héctor | 3B | Cincinnati Pride | 23 | 08/26/1995 | Dorado | PUR | Right | Right | 6' 0" | 190 lbs | - |
| Johnston, Spencer | 1B | Wisconsin Rapids Rangers | 24 | 02/18/1994 | Municipality of Murrysville | USA | Right | Right | 6' 4" | 215 lbs | - |
| Jones, Calvin | 3B | Barry's Bay Orioles | 22 | 02/03/1996 | Mesa | USA | Right | Right | 6' 0" | 215 lbs | - |
| Jones, Larry | SP | Lee's Summit Tigers | 21 | 08/06/1997 | Derry CDP | USA | Right | Right | 5' 8" | 205 lbs | - |
| Jordan, Bryan | MR | Cincinnati Pride | 24 | 04/07/1994 | Carmel-by-the-Sea | USA | Left | Left | 6' 2" | 237 lbs | - |
| Joseph, Bill | LF | Erie Jaxx | 31 | 06/28/1987 | Murrieta | USA | Left | Left | 6' 0" | 191 lbs | - |
| Juárez, Raúl | MR | Free Agent | 27 | 08/20/1991 | Arroyo | PUR | Right | Right | 6' 5" | 218 lbs | - |
