| 12/31/2018 | ||||||
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| J |
| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| James, Josh | RF | Chula Vista Tacos | 23 | 10/18/1995 | Lancaster | USA | Left | Left | 6' 2" | 170 lbs | - |
| James, Ron | C | Lloydminster Lynx | 22 | 04/12/1996 | New York | USA | Right | Right | 6' 1" | 215 lbs | - |
| Jaramillo, Claudio | 3B | Free Agent | 30 | 06/22/1988 | Pembroke Pines | USA | Right | Right | 6' 1" | 190 lbs | - |
| Jerram, Nick | 1B | Salem Sledgehammers | 20 | 11/13/1998 | Niles | USA | Right | Right | 6' 2" | 210 lbs | - |
| Jiménez, Cristóbal | 3B | Jasper Cougars | 23 | 10/19/1995 | Denison | USA | Right | Right | 6' 0" | 175 lbs | - |
| Johnson, Jim | CF | Free Agent | 25 | 03/19/1993 | Twinsburg | USA | Left | Left | 6' 3" | 222 lbs | - |
| Johnson, Warren | SP | Chula Vista Tacos | 21 | 10/19/1997 | Greenup | USA | Right | Right | 6' 5" | 225 lbs | - |
| Johnston, Eric | MR | Free Agent | 26 | 07/26/1992 | South Bend | USA | Right | Right | 5' 9" | 210 lbs | - |
| Jones, Mark | SP | Seattle Rainiers | 23 | 02/01/1995 | Apache Junction | USA | Right | Right | 6' 1" | 190 lbs | - |
| Joyce, Jared | MR | Salem Sledgehammers | 24 | 12/01/1994 | Hendersonville | USA | Right | Left | 6' 3" | 250 lbs | - |
| Juárez, Jesús | CF | Jasper Cougars | 23 | 09/30/1995 | Hamilton | USA | Left | Left | 6' 1" | 170 lbs | - |
| Juárez, Raúl | MR | Salem Sledgehammers | 22 | 09/15/1996 | Havana | CUB | Left | Left | 6' 2" | 235 lbs | - |
