| Name | NBC Team | Last MLB Team | Last MLB Year |
|---|---|---|---|
| Rick Monday | Fairbanks Goldpanners | Los Angeles Dodgers | 1984 |
| Rick Reichardt | WI | Kansas City Royals | 1974 |
| Rick Wrona | Hutchinson, KS | Milwaukee Brewers | 1994 |
| Rickey Keeton | Kenai Peninsula Oilers | Milwaukee Brewers | 1981 |
| Rickey Wright | Boulder Collegians | Texas Rangers | 1986 |
| Ricky Nelson | Rapid City, SD | Seattle Mariners | 1986 |
| Rob Ellis | Grand Rapids, MI | Milwaukee Brewers | 1975 |
| Rob Maurer | Clarinda A’s | Texas Rangers | 1992 |
| Robert Ramsay | Kelowna Falcons | Seattle Mariners | 2000 |
| Robin Ventura | Santa Maria Indians | Chicago White Sox | 2004 |
| Robin Ventura | Santa Maria Indians | Los Angeles Dodgers | 2004 |
| Rod Bolton | Hartselle, AL | Chicago White Sox | 1995 |
| Rod Booker | Humboldt Crabs | Philadelphia Phillies | 1991 |
| Rodney Myers | Clarinda A’s | Los Angeles Dodgers | 2004 |
| Roger Clemens | Hutchinson Broncos | Boston Red Sox | 2007 |
| Roger Clemens | Hutchinson Broncos | New York Yankees | 2007 |
| Roger McDowell | Hutchinson, KS | Baltimore Orioles | 1996 |
| Roger Metzger | Liberal Bee Jays | San Francisco Giants | 1980 |
| Ron Flores | Matsu Miners, Ontario Meadow Larks | Oakland Athletics | 2007 |
| Ron Gardenhire | Wichita, KS | New York Mets | 1985 |
| Ron Guidry | Anchorage Glacier Pilots | Atlanta Braves | 1988 |
| Ron Guidry | Liberal Bee Jays | New York Yankees | 1988 |
| Ron Johnson | Boulder Collegians | Montreal Expos | 1984 |
| Ron Jones | Senguin | Philadelphia Phillies | 1991 |
| Ron Kittle | Chicago AHEPA | Chicago White Sox | 1991 |
| Ron Kittle | Chicago AHEPA | Chicago White Sox | 1991 |
| Ron Pruitt | Grand Rapids, MI | San Francisco Giants | 1983 |
| Ron Roenicke | Fairbanks Goldpanners, Matsu Miners | Cincinnati Reds | 1988 |
| Ron Romanick | Fairbanks Goldpanners | California Angels | 1986 |
| Ron Stone | Everett Merchants | Philadelphia Phillies | 1972 |
| Ronn Reynolds | Wichita, KS | San Diego Padres | 1990 |
| Ross Ohlendorf | Austin, TX | Cincinnati Reds | 2016 |
| Ross Stripling | San Luis Obispo Blues | San Francisco Giants | |
| Roy Smalley | Anchorage Bucs | Minnesota Twins | 1987 |
| Russ Heman | San Diego, CA | Los Angeles Angels | 1961 |
| Russ Springer | Liberal Bee Jays | Cincinnati Reds | 2010 |
| Rusty Gerhardt | Fairbanks Goldpanners | San Diego Padres | 1974 |
| Ryan Church | Santa Barbara Foresters | Arizona Diamondbacks | 2010 |
| Ryan Cook | Santa Barbara Foresters | Seattle Mariners | 2018 |
| Ryan Hancock | Anchorage Bucs | California Angels | 1996 |