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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Ramírez, Ángel | SP | Riverside Red Bulls | 25 | 01/09/1993 | Corpus Christi | USA | Right | Right | 5' 11" | 185 lbs | - |
| Ramírez, António | SP | Moose Jaw Ghostbusters | 23 | 12/22/1995 | San Pedro | CRC | Right | Right | 6' 0" | 240 lbs | - |
| Ramírez, Arturo | SP | Riverside Red Bulls | 33 | 07/14/1985 | Queens | USA | Left | Left | 6' 4" | 215 lbs | - |
| Ramos, Eduardo | MR | Balzac Rams | 23 | 06/09/1995 | San Juan | PUR | Right | Right | 6' 3" | 220 lbs | - |
| Ramos, Mario | CL | San Diego Smashers | 24 | 06/28/1994 | Guaynabo | PUR | Right | Right | 6' 2" | 210 lbs | - |
| Ramsey, Jack | C | Riverside Red Bulls | 28 | 10/18/1990 | Norfolk | USA | Switch | Right | 6' 0" | 200 lbs | - |
| Reidfurd, David | 1B | Free Agent | 28 | 12/11/1990 | Buford | USA | Switch | Left | 6' 1" | 217 lbs | - |
| Reyes, Martín | SP | Moose Jaw Ghostbusters | 23 | 05/29/1995 | New York | USA | Left | Left | 5' 11" | 235 lbs | - |
| Reyes, Tony | C | Culver City Extras | 22 | 05/10/1996 | Salamanca | MEX | Right | Right | 6' 1" | 215 lbs | - |
| Richards, Matt | SS | Oakland Giants | 23 | 05/25/1995 | Anaheim | USA | Right | Right | 6' 0" | 185 lbs | - |
| Rico, Félix | MR | La Crosse Loggers | 34 | 12/23/1984 | Provo | USA | Right | Right | 6' 1" | 191 lbs | - |
| Ríos, Orlando | MR | Oakland Giants | 26 | 08/04/1992 | Houston | USA | Left | Left | 6' 2" | 221 lbs | - |
| Rivera, Diego | LF | Bismark Border Guards | 22 | 10/16/1996 | San German | CUB | Right | Right | 6' 2" | 175 lbs | - |
| Rivera, Marcos | SP | Bismark Border Guards | 23 | 06/15/1995 | Villa Altagracia | DOM | Right | Right | 5' 11" | 200 lbs | - |
| Rivera, Martín | C | Free Agent | 28 | 02/09/1990 | Comerío | PUR | Right | Right | 5' 9" | 181 lbs | - |
| Roach, Derek | C | La Crosse Loggers | 24 | 08/24/1994 | Tucson | USA | Switch | Right | 6' 2" | 230 lbs | - |
| Robinson, Jeff | SP | Oakland Giants | 30 | 04/20/1988 | Bristol | USA | Left | Left | 6' 1" | 205 lbs | - |
| Rocha, António | 2B | Free Agent | 24 | 06/24/1994 | Mexico City | MEX | Switch | Right | 6' 3" | 190 lbs | - |
| Rodocanachi, Lionnel | C | Free Agent | 29 | 01/14/1989 | Bari | ITA | Right | Right | 6' 0" | 207 lbs | - |
| Rodríguez, Ramón | SP | La Crosse Loggers | 24 | 08/04/1994 | Bayamón | PUR | Right | Right | 5' 10" | 225 lbs | - |
| Romero, José | 1B | La Crosse Loggers | 32 | 08/01/1986 | Ciudad Bolívar | VEN | Right | Right | 6' 3" | 185 lbs | - |
| Rose, Mike | MR | Balzac Rams | 28 | 04/21/1990 | Niagara Falls | USA | Right | Right | 6' 0" | 199 lbs | - |
| Ruíz, Gabriel | SP | Balzac Rams | 23 | 01/20/1995 | Piedra Blanca | DOM | Left | Right | 5' 11" | 225 lbs | - |
| Ruíz, Raúl | SS | Free Agent | 27 | 11/03/1991 | Dallas | USA | Right | Right | 5' 11" | 190 lbs | - |
| Ryan, Josh | SP | Oakland Giants | 24 | 11/04/1994 | Indianapolis | USA | Switch | Left | 5' 8" | 200 lbs | - |
