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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Ramírez, Jorge | 2B | West Virginia Power | 24 | 12/25/1994 | Buenos Aires | ARG | Right | Right | 5' 11" | 220 lbs | - |
| Ramírez, Roberto | CF | Memphis Blues | 25 | 10/16/1993 | San Juan | PUR | Right | Right | 6' 0" | 180 lbs | - |
| Ramos, António | MR | Gainesville Guidos | 23 | 04/09/1995 | Carolina | PUR | Right | Right | 6' 1" | 210 lbs | - |
| Ramsey, Cedric | SS | Free Agent | 30 | 07/27/1988 | Woodstock | USA | Right | Right | 6' 1" | 184 lbs | - |
| Ramsey, Derek | 1B | West Virginia Power | 22 | 05/06/1996 | Bowling Green | USA | Right | Right | 6' 0" | 195 lbs | - |
| Ratzlaff, Gary | SS | New Hampshire Fisher Cats | 30 | 05/02/1988 | Athens-Clarke County | USA | Right | Right | 5' 10" | 182 lbs | - |
| Reed, Danny | 3B | Wichita Wranglers | 25 | 12/27/1993 | Monroe | USA | Right | Right | 6' 0" | 215 lbs | - |
| Reed, Jeff | CF | West Virginia Power | 26 | 06/25/1992 | Cedar Park | USA | Left | Left | 5' 10" | 205 lbs | - |
| Reed, Joel | MR | Montgomery Biscuits | 25 | 11/19/1993 | Leavenworth | USA | Right | Right | 6' 5" | 225 lbs | - |
| Reeves, Dan | 2B | BlackIron Dragons | 28 | 01/01/1990 | Airmont | USA | Switch | Right | 6' 2" | 219 lbs | - |
| Reyes, César | 3B | Gainesville Guidos | 24 | 10/21/1994 | New York | USA | Right | Right | 6' 0" | 211 lbs | - |
| Ricks, Vicente | C | Memphis Blues | 24 | 01/15/1994 | Atlanta | USA | Switch | Right | 5' 11" | 215 lbs | - |
| Rico, Manuel | LF | Montgomery Biscuits | 21 | 11/14/1997 | San Juan | PUR | Right | Right | 6' 2" | 175 lbs | - |
| Rivera, Ernesto | SP | New Hampshire Fisher Cats | 23 | 02/26/1995 | Atlanta | USA | Right | Right | 6' 0" | 170 lbs | - |
| Rivera, Jesús | LF | Gainesville Guidos | 23 | 10/23/1995 | Camagüey | CUB | Switch | Right | 6' 1" | 180 lbs | - |
| Robinson, Tom | C | Wichita Wranglers | 23 | 10/04/1995 | Hempstead | USA | Left | Right | 5' 11" | 200 lbs | - |
| Rodríguez, Ángel | 3B | Key West Barracudas | 25 | 03/19/1993 | Hauppauge | USA | Right | Right | 6' 2" | 215 lbs | - |
| Rodríguez, Luis | LF | New Hampshire Fisher Cats | 31 | 12/12/1987 | Temuco | CHI | Right | Right | 5' 10" | 184 lbs | - |
| Rogers, Joel | C | Memphis Blues | 25 | 02/05/1993 | Bayonne | USA | Left | Right | 6' 1" | 217 lbs | - |
| Rogers, Marvin | MR | Free Agent | 29 | 01/13/1989 | Brea | USA | Right | Right | 6' 4" | 227 lbs | - |
| Rogers, Todd | 2B | Montgomery Biscuits | 25 | 06/01/1993 | Ashdown | USA | Right | Right | 6' 0" | 225 lbs | - |
| Román, Robinson | 1B | Memphis Blues | 24 | 04/18/1994 | The Bronx | USA | Right | Right | 6' 3" | 215 lbs | - |
| Romano, José | SP | Gainesville Guidos | 22 | 09/10/1996 | Havana | CUB | Right | Right | 6' 1" | 235 lbs | - |
| Romero, Javier | SP | Wichita Wranglers | 28 | 02/21/1990 | Boston | USA | Right | Left | 6' 1" | 176 lbs | - |
| Romo, Alejandro | CF | Wichita Wranglers | 31 | 12/30/1987 | Santiago | DOM | Switch | Right | 6' 0" | 181 lbs | - |
| Rosa, Miguel | LF | Gainesville Guidos | 22 | 12/25/1996 | Bayamo | CUB | Left | Left | 6' 2" | 185 lbs | - |
| Rosales, Miguel | MR | New Hampshire Fisher Cats | 27 | 03/23/1991 | Hermosillo | MEX | Right | Right | 6' 3" | 195 lbs | - |
| Ross, Fred | 2B | Free Agent | 32 | 01/21/1986 | Saint Petersburg | USA | Right | Right | 5' 9" | 208 lbs | - |
| Rounds, Jeff | MR | BlackIron Dragons | 30 | 06/23/1988 | New York | USA | Right | Right | 6' 0" | 220 lbs | - |
| Rousseau, Daniel | MR | Montgomery Biscuits | 23 | 03/24/1995 | High Point | USA | Right | Right | 6' 2" | 245 lbs | - |
| Ruíz, Carlos | CL | New Hampshire Fisher Cats | 23 | 02/10/1995 | Lakeland | USA | Right | Right | 5' 11" | 230 lbs | - |
| Ruíz, José | MR | West Palm Reds | 22 | 10/22/1996 | Matanzas | CUB | Right | Right | 6' 4" | 230 lbs | - |
| Ruíz, Juan | MR | Free Agent | 31 | 03/26/1987 | Carolina | PUR | Right | Right | 6' 4" | 222 lbs | - |
| Ruíz, Salvador | CF | West Palm Reds | 24 | 11/01/1994 | Costa Mesa | USA | Left | Left | 6' 3" | 180 lbs | - |
