Player Draft
| Name | State | School | Class | Pos. | Year | Round | Team |
| Dylan Rheault | IL | Glenbard South | 2010 | RHP | 2013 | 19 | Orioles |
| Jeremy Rhoades | IL | Wheaton Warrenville South | 2011 | RHP | 2014 | 4 | Angels |
| David Rhodes | BC | Langley Fine Arts | 2018 | RHP | 2018 | 40 | Seattle Mariners |
| Caleb Ricca | LA | Dutchtown High School | 2016 | SS | 2019 | 23rd | Mariners |
| Ben Rice | MA | Noble and Greenough | 2018 | C | 2021 | 12 | New York Yankees |
| Owen Rice | WI | East Troy | 2021 | LHP | 2024 | 20 | Cardinals |
| Lyon Richardson | FL | Jensen Beach | 2018 | RHP | 2018 | 2 | Reds |
| Grant Richardson | IN | Fishers | 2018 | OF | 2021 | 17 | Yankees |
| Tre Richardson | TX | Kingwood | 2020 | SS | 2023 | 15 | Cardinals |
| Caleb Ricketts | CA | Orange Lutheran | 2018 | 2B | 2022 | 7 | Phillies |
| Obie Ricumstrict | MI | Mt. Pleasant | 2017 | SS | 2017 | 11 | Rangers |
| Barrett Riebock | TX | Rockwall | 2021 | OF | 2023 | 17 | Guardians |
| Justin Riemer | VA | St. John's College | 2020 | SS | 2023 | 4C | Red Sox |
| Harold Riggins | IL | Normal West | 2008 | 1B | 2011 | 7 | Rockies |
| Roc Riggio | CA | Thousand Oaks | 2021 | 2B | 2023 | 4 | Yankees |
| Ryan Rijo | ON | St. Joseph's Catholic | 2016 | 1B | 2018 | 37 | Phlladelphia Phillies |
| Connor Riley | IL | Marmion | 2013 | RHP | 2017 | 8 | Angels |
| Will Riley | VA | James River (Midlothian) | 2020 | SS | 2024 | 8 | Mariners |
| Bryan Rincon | PA | Shaler Area | 2022 | SS | 2022 | 14 | Phillies |
| Gabriel Rincones | FL | Plant | 2019 | OF | 2022 | 3 | Phillies |
| Jake Ring | IL | Grant | 2013 | OF | 2016 | 31 | Orioles |
| Justin Ringo | IL | Stagg | 2009 | 1B | 2013 | 28 | Cardinals |
| Willie Rios | CT | St Bernard | 2014 | LHP | 2016 | 16 | Orioles |
| Alberto Rios | CA | St. John Bosco | 2020 | OF | 2023 | 3 | Angels |
| JR Ritchie | WA | Bainbridge Island | 2022 | RHP | 2022 | CBA | Braves |
| Kollin Ritchie | OK | Atoka | 2023 | 1B | 2023 | 19 | Orioles |
| Luke Ritter | MO | Rockhurst | 2015 | 2B | 2019 | 7 | Mets |
| Ryan Ritter | IL | Lincoln-Way East | 2019 | SS | 2022 | 4 | Rockies |
| Josh Rivera | FL | IMG Academy | 2019 | 3B | 2019 | 22 | Padres |
| Geo Rivera | VA | Lafayette | 2019 | RHP | 2022 | 19 | Guardians |
| Eduardo Yael Rivera Nieves | PR | CADEST | 2021 | LHP | 2021 | 11 | Oakland |
| Dan Rizzie | IL | Sandburg | 2012 | C | 2016 | 13 | Mets |
| Joe Rizzo | VA | Oakton | 2016 | 3B | 2016 | 2 | Mariners |
| Dalton Roach | WI | Eau Claire Memorial | 2014 | RHP | 2018 | 21 | Astros |
| Victor Roache | MI | Lincoln | 2009 | OF | 2012 | 1 | Brewers |
| Seth Roadcap | WV | Capital | 2014 | C | 2014 | 39 | Reds |
| Otto Roberts | IL | Belleville West | 2008 | RHP | 2008 | 23 | Braves |
| DeAundre (DJ) Roberts | FL | Atlantic Coast | 2016 | RHP | 2016 | 40 | Cubs |
| Kyle Roberts | MI | Allen Park | 2014 | - | 2016 | 5 | Rangers |
| Shane Roberts | FL | Dwyer | 2017 | RHP | 2017 | 28 | Yankees |
| Brett Roberts | GA | North Atlanta | 2019 | SS | 2022 | 16 | Marlins |
| Nick Robertson | VA | Franklin County | 2016 | RHP | 2019 | 7th | Dodgers |
| Trae Robertson | MO | Hickman | 2018 | LHP | 2018 | 38 | Royals |
| Blake Robertson | OK | Edmond Santa Fe | 2019 | 3B | 2022 | 7 | Rays |
| Chuckie Robinson | IL | Danville | 2013 | C | 2016 | 21 | Astros |
| Christian Robinson | FL | Viera | 2017 | OF | 2017 | 27 | Padres |
| Cam Robinson | FL | University | 2017 | RHP | 2017 | 23 | Brewers |
| Kobe Robinson | TN | Alcoa | 2019 | RHP | 2021 | 13 | Padres |
| Kyle Robinson | VA | Marshall | 2021 | RHP | 2024 | 11 | Athletics |
| Hayden Robinson | LA | Berwick | 2023 | RHP | 2023 | 14 | Brewers |
| Jacob Robson | ON | Windsor | 2012 | OF | 2016 | 8 | Tigers |
| Tekoah Roby | FL | Pine Forest | 2020 | RHP | 2020 | 3 | Rangers |
| Carson Roccaforte | TX | Port Neches-Groves | 2020 | OF | 2023 | 2-B | Royals |
| Dylan Rock | TX | George Ranch | 2017 | OF | 2022 | 8 | Blue Jays |
| Kumar Rocker | GA | North Oconee | 2018 | RHP | 2022 | 1 | Rangers |
| Brock Rodden | OK | Oktaha | 2019 | SS | 2022 | 10 | Athletics |
| Alan Roden | WI | Middleton | 2018 | C | 2022 | 3 | Blue Jays |
| Brendan Rodgers | FL | Lake Mary | 2015 | SS | 2015 | 1 | Rockies |
| Wesley Rodriguez | NY | George Washington | 2015 | RHP | 2015 | 12 | Diamondbacks |
| Luis Rodriguez | FL | Calusa Prep | 2015 | RHP | 2015 | 34 | Dodgers |
| Chris Rodriguez | FL | Monsignor Pace | 2016 | RHP | 2016 | 4 | Angels |
| CJ Rodriguez | CA | Mater Dei | 2019 | C | 2021 | 5 | OAK |
| Christian Rodriguez | CA | Orange Lutheran | 2020 | RHP | 2024 | 10 | Orioles |
| Erian Rodriguez | GA | Georgia Premier | 2021 | RHP | 2021 | 13th | Chicago Cubs |
| Raudi Rodriguez | GA | Georgia Premier Academy | 2023 | OF | 2023 | 19 | Angels |
| Cameron Roegner | WI | Beloit Memorial | 2012 | LHP | 2016 | 22 | Brewers |
| Keith Rogalla | IL | Oak Park-River Forest | 2014 | RHP | 2017 | 12 | Angels |
| Josh Rogers | IN | New Albany | 2013 | LHP | 2015 | 11 | Yankees |
| Grant Rogers | TX | Port Neches-Grove | 2019 | 1B | 2023 | 11 | Blue Jays |
| Dalton Rogers | MS | Northwest Rankin | 2019 | LHP | 2022 | 3 | Red Sox |
| Will Rogers | MN | Mounds View | 2021 | C | 2021 | 17th | Milwaukee Brewers |
| Johnathan Rogers | MS | Tupelo | 2023 | RHP | 2023 | 20 | Tigers |
| Mike Rojas | FL | Gulf Coast | 2015 | C | 2015 | 40 | Mariners |
| Ryan Rolison | TN | University School of Jackson | 2016 | LHP | 2016 | 37 | Padres |
| Drew Rom | KY | Highlands | 2018 | LHP | 2018 | 4 | Orioles |
| Mitch Roman | IN | Hamilton Southeastern | 2013 | 2B | 2016 | 12 | White Sox |
| Nate Rombach | TX | Mansfield Legacy | 2019 | C | 2023 | 18 | Nationals |
| Josiah Romeo | ON | Mayfield | 2024 | RHP | 2024 | 6 | Athletics |
| Patrick Romeri | FL | IMG Academy | 2019 | OF | 2019 | 12th | St. Louis Cardinals |
| Kiko Romero | AZ | Canyon Del Oro | 2019 | 1B | 2023 | 7 | Yankees |
| Mikey Romero | CA | Orange Lutheran | 2022 | SS | 2022 | 1 | Red Sox |
| Maxwell Romero Jr. | FL | Pembroke Pines Charter | 2019 | C | 2022 | 9 | Nationals |
| Mason Ronan | PA | Penn Cambria | 2018 | LHP | 2018 | 29 | Red Sox |
| John Rooney | NY | Hoosic Valley | 2015 | LHP | 2018 | 3 | Los Angeles Dodgers |
| Reid Roper | IL | Harrisburg | 2010 | RHP | 2010 | 29 | Braves |
| Ben Rortvedt | WI | Verona Area | 2016 | C | 2016 | 2 | Twins |
| Dylan Rosa | IL | Providence Catholic | 2014 | 3B | 2017 | 18 | Tigers |
| Jamaliel Rosado | FL | Sunshine Academy | 2022 | SS | 2022 | 14 | Athletics |
| Alejandro Rosario | FL | Miami Christian | 2020 | RHP | 2023 | 5 | Rangers |
| Alfonsin Rosario | SC | P27 | 2023 | OF | 2023 | 6 | Cubs |
| Nick Roscetti | IL | Williamsville | 2012 | SS | 2016 | 26 | Brewers |
| Joey Rose | NJ | Toms River North | 2016 | 3B | 2016 | 5 | Diamondbacks |
| Caden Rose | AL | Bob Jones | 2020 | SS | 2023 | 7 | Red Sox |
| Brady Rose | CO | Standley Lake | 2019 | LHP | 2023 | 12 | Yankees |
| Simon Rosenblum-Larson | WI | Madison West | 2015 | RHP | 2018 | 19 | Rays |
| Kevin Ross | IL | Niles West | 2012 | SS | 2012 | 8 | Pirates |
| Austin Ross | PA | Beaver Area | 2013 | RHP | 2018 | 35 | Phillies |
| Benjamin Ross | OH | Springfield Shawnee | 2019 | SS | 2022 | 5 | Twins |
| Jackson Ross | FL | George W Jenkins | 2018 | SS | 2024 | 9 | Nationals |
| Dylan Ross | GA | Statesboro | 2018 | RHP | 2022 | 13 | Mets |