Player Draft
| Name | State | School | Class | Pos. | Year | Round | Team |
| Isaac Lyon | UT | Snow Canyon | 2022 | RHP | 2025 | 10 | Seattle Mariners |
| Jared Lyons | VA | West Springfield | 2018 | RHP | 2022 | 14 | Reds |
| Will Mabrey | TN | Upperman | 2019 | LHP | 2022 | 6 | Diamondbacks |
| Danny Macciarola | NY | Xavier | 2022 | RHP | 2025 | 8 | Seattle Mariners |
| Zach MacDonald | MI | Portage Central | 2021 | OF | 2024 | 15 | Tigers |
| Tommy Mace | FL | Sunlake | 2017 | RHP | 2017 | 12 | Reds |
| Travis MacGregor | FL | East Lake | 2016 | RHP | 2016 | 2 | Pirates |
| Dallas Macias | CO | Regis Jesuit | 2022 | SS | 2025 | 15 | Atlanta Braves |
| Charles Mack | NY | Williamsville East | 2018 | SS | 2018 | 6 | Minnesota Twins |
| Joe Mack | NY | Williamsville East | 2021 | C | 2021 | 1 | Miami |
| Adam Macko | AB | Vauxhall Academy of Baseball | 2019 | LHP | 2019 | 7 | Seattle Mariners |
| Ryan Madden | CO | Fairview | 2015 | RHP | 2015 | 35 | Rockies |
| Jake Madden | PA | East Pennsboro | 2020 | RHP | 2022 | 4 | Angels |
| Riley Maddox | MS | Jackson Preparatory | 2021 | RHP | 2025 | 8 | Washington Nationals |
| Truitt Madonna | WA | Ballard | 2025 | C | 2025 | 11 | San Diego Padres |
| Bryce Madron | OK | Blanchard | 2020 | OF | 2024 | 10 | Cardinals |
| Brandon Magallones | IL | Providence Catholic | 2011 | RHP | 2015 | 24 | White Sox |
| Ryan Magdic | ON | Blessed Trinity Catholic | 2018 | 1B | 2024 | 14 | Athletics |
| Josh Magee | LA | Franklinton | 2015 | OF | 2015 | 5 | Padres |
| Cameron Magee | CA | Canyon | 2021 | SS | 2023 | 18 | Braves |
| Riley Mahan | OH | Moeller | 2014 | SS | 2017 | 3rd | Miami Marlins |
| Lucas Mahlstedt | FL | Spruce Creek | 2021 | RHP | 2025 | 7 | Los Angeles Angels |
| Jack Mahoney | IL | St. Viator | 2020 | SS | 2023 | 3 | Rockies |
| Adam Maier | BC | Carson Graham | 2019 | RHP | 2022 | 7 | Braves |
| Aidan Major | PA | Central Mountain | 2021 | RHP | 2024 | 5 | Guardians |
| Alex Makarewich | TX | Keller | 2020 | RHP | 2023 | 13 | Dodgers |
| Cooper Malamazian | IL | Nazareth Academy | 2024 | SS | 2024 | 17 | Brewers |
| Cory Malcom | IN | Elkhart Central | 2013 | 3B | 2017 | 34 | Cardinals |
| Welby Malczewski | IL | Prospect | 2013 | LHP | 2016 | 37 | Diamondbacks |
| Nick Maldonado | NJ | Seton Hall Prep | 2019 | RHP | 2023 | 8 | Marlins |
| Aidan Maldonado | MN | Rosemount | 2018 | RHP | 2022 | 14 | Brewers |
| Cameron Maldonado | CT | Hamden Hall Country Day School | 2022 | OF | 2025 | 7 | San Francisco Giants |
| Ben Malgeri | NH | Exeter | 2018 | OF | 2021 | 18 | Detroit Tigers |
| Kevin Malisheski | IL | Wauconda | 2016 | RHP | 2016 | 38 | Dodgers |
| Brennan Malone | FL | IMG Academy | 2019 | RHP | 2019 | 1st(C) | Arizona Diamondbacks |
| Sean Manaea | IN | Andrean | 2010 | LHP | 2013 | 1 | Royals |
| Alex Manasa | MI | Farmington | 2016 | OF | 2017 | 11 | Pirates |
| Joe Mancini | CT | Fairfield Prep | 2018 | RHP | 2022 | 15 | Astros |
| Mark Manfredi | OH | Mayfield | 2018 | LHP | 2023 | 9 | Brewers |
| Luke Mangieri | IL | Dunlap | 2015 | 3B | 2018 | 25 | Pirates |
| Stevie Mangrum | VA | Western Albermarle | 2015 | 3B | 2015 | 28 | Red Sox |
| Thomas Mangus | TX | McKinney Boyd | 2022 | RHP | 2024 | 18 | Cubs |
| Devin Mann | IN | Columbus North | 2015 | 2B | 2018 | 5 | Dodgers |
| Steve Mann | MI | Detroit Country Day | 2017 | OF | 2017 | 38 | Tigers |
| Luke Mann | MO | St. John Vianney | 2018 | 3B | 2023 | 14 | Athletics |
| Hunter Mann | TN | Gordonsville | 2019 | RHP | 2023 | 14 | Rockies |
| Jett Manning | VA | Battlefield | 2015 | 2B | 2018 | 20 | Giants |
| Timmy Manning | FL | Cardinal Gibbons | 2020 | LHP | 2023 | 12 | Giants |
| Joe Mantiply | VA | Tunstall | 2009 | LHP | 2013 | 27th | Tigers |
| Landon Manzi | CT | Killingly | 2025 | RHP | 2025 | 14 | Texas Rangers |
| Landon Marceaux | LA | Destrehan | 2018 | RHP | 2018 | 37th | Yankees |
| Henry Marchese | IL | Stevenson | 2017 | OF | 2017 | 34 | Padres |
| Joey Marciano | IL | Roberto Clemente | 2013 | LHP | 2017 | 36 | Giants |
| Caden Marcum | KS | Paola | 2022 | RHP | 2022 | 13 | Rangers |
| Brady Marget | WI | Whitefish Bay | 2021 | 1B | 2024 | 16 | Rays |
| James Marinan | FL | Park Vista | 2017 | RHP | 2017 | 4 | Dodgers |
| Jordan Marks | ON | Saint Clair Secondary | 2017 | RHP | 2021 | 8 | Detroit Tigers |
| Easton Marks | CO | Arapahoe | 2022 | RHP | 2025 | 19 | Colorado Rockies |
| Ryan Marohn | VA | Freedom (South Riding) | 2023 | LHP | 2023 | 20 | Guardians |
| Landen Maroudis | FL | Calvary Christian | 2023 | RHP | 2023 | 4 | Blue Jays |
| Caleb Marquez | MO | Blue Springs | 2018 | C | 2018 | 39 | Brewers |
| Elih Marrero | FL | Coral Gables | 2015 | C | 2015 | 29 | Reds |
| Andrew Marrero | CT | Wilbur Cross | 2019 | RHP | 2021 | 18 | St. Louis Cardinals |
| Mason Marriott | TX | Tomball | 2021 | RHP | 2024 | 6 | Diamondbacks |
| Jakob Marsee | MI | Allen Park | 2019 | OF | 2022 | 6 | Padres |
| Alec Marsh | WI | Reagan College Prep | 2016 | RHP | 2019 | 2 | Royals |
| Shane Marshall | FL | Gulf Coast | 2018 | C | 2022 | 14 | Cubs |
| Mike Martin | IL | Stevenson | 2011 | OF | 2015 | 33 | Athletics |
| Austin Martin | FL | Trinity Christian Academy | 2017 | 3B | 2017 | 37 | Indians |
| Trevor Martin | OK | Asher | 2020 | RHP | 2022 | 3 | Rays |
| Christian Martin | VA | Amherst Co. | 2021 | 2B | 2024 | 18 | Cardinals |
| Logan Martin | GA | Cartersville | 2019 | RHP | 2023 | 12 | Royals |
| Colby Martin | PA | Warwick | 2019 | 2B | 2024 | 16 | Blue Jays |
| David Martin | CA | Chino Hills | 2019 | - | 2022 | 16 | Diamondbacks |
| Payton Martin | NC | West Forsyth | 2022 | SS | 2022 | 17 | Dodgers |
| Walker Martin | CO | Eaton | 2023 | SS | 2023 | 2 | Giants |
| Maximus Martin | NJ | Moorestown | 2022 | SS | 2025 | 10 | Boston Red Sox |
| Maxton Martin | WA | Southridge | 2023 | OF | 2023 | 11 | Rangers |
| Max Martin | CA | Sierra Canyon | 2022 | RHP | 2025 | 10 | Kansas City Royals |
| Bryce Martin-Grudzielanek | CA | Torrey Pines | 2021 | SS | 2025 | 20 | New York Yankees |
| Chazz Martinez | CA | Corona del Mar | 2018 | LHP | 2022 | 17 | Royals |
| Anthony Martinez | CA | De La Salle | 2022 | C | 2025 | 8 | Cleveland Guardians |
| Maison Martinez | FL | Park Vista | 2022 | RHP | 2025 | 16 | Cincinnati Reds |
| Jack Martinez | FL | Jesuit | 2022 | SS | 2025 | 8 | Arizona Diamondbacks |
| Henry Martinez | FL | Miami Christian | 2022 | RHP | 2022 | 16 | Padres |
| Nick Martini | IL | Prarie Ridge | 2008 | OF | 2011 | 7 | Cardinals |
| Lucas Martino | NC | Carmel Christian | 2020 | 1B | 2020 | FA | Arizona Diamondbacks |
| Brandon Martorano | NJ | Christian Brothers Academy | 2016 | C | 2016 | 30 | Diamondbacks |
| Nathan Martorella | CA | Salinas | 2019 | 1B | 2022 | 5 | Padres |
| Mike Massey | IL | Brother Rice | 2016 | 2B | 2019 | 4 | Royals |
| J.P Massey | IL | Gwendolyn Brooks | 2018 | RHP | 2022 | 7 | Pirates |
| Michael Massey | GA | North Gwinnett | 2021 | RHP | 2024 | 4 | Tigers |
| Jean-Christophe Masson | QC | Pointe-Levy | 2020 | OF | 2019 | 26 | Toronto Blue Jays |
| Michael Mateja | IL | Bradley-Bourbonnais | 2015 | SS | 2018 | 25 | Braves |
| Francisco Mateo | FL | Montverde Academy | 2018 | RHP | 2021 | Free Agent | Los Angeles Dodgers |
| Nick Matera | NJ | Morris Catholic | 2015 | C | 2018 | 34 | Philadelphia Phillies |
| Tate Matheny | MO | Westminster Christian | 2012 | OF | 2015 | 4 | Red Sox |
| Alden Mathes | PA | Marple Newtown | 2019 | OF | 2022 | 19 | Orioles |
| Quinn Mathews | CA | Aliso Niguel | 2019 | LHP | 2022 | 19 | Rays |
| Ryan Mathiesen | CA | Westmont | 2021 | C | 2024 | 14 | Astros |