Player Draft
| Name | State | School | Class | Pos. | Year | Round | Team |
| Dylan Mathiesen | PA | Montour | 2022 | RHP | 2025 | 13 | Pittsburgh Pirates |
| Brad Mathiowetz | MN | Rochester Mayo | 2014 | C | 2014 | 35 | Twins |
| Cole Mathis | GA | Harris County | 2021 | 3B | 2024 | 2 | Cubs |
| Carter Mathison | IN | Homestead | 2021 | OF | 2024 | 5 | Phillies |
| J.J. Matijevic | PA | Norwin | 2014 | 1B | 2017 | 2 | Astros |
| Phil Maton | IL | Chatham-Glenwood | 2011 | RHP | 2015 | 20 | Padres |
| Nick Maton | IL | Chatham-Glenwood | 2015 | SS | 2017 | 7 | Phillies |
| Jacob Maton | IL | Chatham-Glenwood | 2018 | RHP | 2018 | 39 | Mariners |
| Sean Matson | PA | Unionville | 2021 | RHP | 2024 | 9 | Guardians |
| Case Matter | WA | Jackson | 2020 | RHP | 2023 | 10 | Rangers |
| John Matthews | PA | Punxsutawney Area | 2016 | RHP | 2019 | 8 | Rangers |
| Zebby Matthews | NC | Smoky Mountain | 2018 | SS | 2022 | 8 | Twins |
| Brice Matthews | TX | Atascocita | 2020 | SS | 2023 | 1 | Astros |
| Carson Matthews | CA | Capistrano Valley Christian | 2018 | SS | 2021 | Free Agent | Los Angeles Angels |
| Tyler Mattison | NY | Fort Ann | 2017 | RHP | 2021 | 4 | Detroit Tigers |
| Isaac Mattson | PA | Harbor Creek | 2014 | RHP | 2017 | 19 | Angels |
| Brycen Mautz | CA | Westview | 2019 | LHP | 2022 | 2 | STL |
| Zach Maxwell | GA | North Paulding | 2019 | RHP | 2022 | 6 | Reds |
| Aiden May | NM | Sandia | 2021 | RHP | 2024 | CB-B | Marlins |
| Seth Mayberry | VA | Dinwiddie | 2018 | RHP | 2018 | 39 | Padres |
| Dan Mayer | IL | Downers Grove South | 2013 | RHP | 2017 | 31 | Phillies |
| Bryce Mayer | MO | St. Francis Borgia | 2020 | RHP | 2024 | 16 | Astros |
| Marcelo Mayer | CA | Eastlake | 2021 | SS | 2021 | 1 | BOS |
| Jacob Mayers | LA | St. Amant | 2022 | RHP | 2025 | 9 | Boston Red Sox |
| Kash Mayfield | OK | Elk City | 2024 | LHP | 2024 | 1 | Padres |
| CJ Mayhue | NC | Crest | 2019 | LHP | 2019 | 36 | Seattle Mariners |
| Coby Mayo | FL | Stoneman Douglas | 2020 | 3B | 2020 | 4 | Baltimore Orioles |
| Adam Mazur | MN | Woodbury | 2019 | RHP | 2022 | 2 | Padres |
| Nikolas Mazza | MS | Madison Ridgeland | 2021 | RHP | 2024 | 8 | Giants |
| Charles McAdoo | CA | De La Salle | 2020 | 2B | 2023 | 13 | Pirates |
| Michael McAvene | IN | Roncalli | 2016 | RHP | 2019 | 3 | Cubs |
| Ben McCabe | FL | Sarasota | 2018 | C | 2023 | 9 | Rockies |
| David McCabe | ON | Everest Academy | 2019 | 3B | 2022 | 4 | Braves |
| Liam McCall | FL | First Coast | 2017 | RHP | 2017 | 29 | Mets |
| Zach McCambley | PA | Pocono Mountain East | 2017 | RHP | 2020 | 3 | Marlins |
| TJ McCants | FL | Pensacola Catholic | 2020 | OF | 2024 | 16 | White Sox |
| Jordan McCants | FL | Pensacola Catholic | 2021 | SS | 2021 | 3 | Miami Marlins |
| Jake McCarthy | PA | Scranton | 2015 | OF | 2018 | 2 | Diamondbacks |
| Will McCausland | PA | Souderton Area | 2022 | RHP | 2025 | 7 | Cleveland Guardians |
| Shane McClanahan | FL | Cape Coral | 2015 | LHP | 2015 | 26 | Mets |
| Kade McClure | OH | Mentor | 2014 | RHP | 2017 | 6 | White Sox |
| D'vone McClure | AR | Jacksonville | 2012 | OF | 2012 | 4 | Indians |
| Brady McConnell | FL | Merritt Island | 2017 | SS | 2017 | 33 | Reds |
| Cole McConnell | TX | West Brook | 2019 | OF | 2024 | 10 | White Sox |
| Michael McCormick | IN | Speedway | 2012 | RHP | 2017 | 34 | White Sox |
| Chas McCormick | PA | Henderson | 2013 | LHP | 2017 | 21 | Astros |
| Matt McCormick | IL | St. Laurence | 2019 | C | 2019 | 40 | Reds |
| Mason McCoy | IL | Washington | 2013 | 2B | 2017 | 6 | Orioles |
| Kyle McCoy | NJ | Hunterdon Central | 2022 | LHP | 2025 | 8 | Cincinnati Reds |
| Grant McCray | FL | Lakewood Ranch | 2019 | OF | 2019 | 3rd | San Francisco Giants |
| Mac McCroskey | AR | Har-Ber | 2018 | SS | 2023 | 20 | Angels |
| Ryan McCrystal | NC | Fuquay-Varina | 2021 | C | 2024 | 9 | Reds |
| Carter McCulley | FL | Pensacola Catholic` | 2022 | SS | 2022 | 20 | Dodgers |
| Brody McCullough | NC | Sheets Memorial Christian | 2018 | RHP | 2022 | 10 | Cubs |
| Jake McCutcheon | MO | Francis Howell | 2022 | SS | 2025 | 10 | Miami Marlins |
| Chayce McDermott | IN | Pendleton Heights | 2017 | RHP | 2021 | 4 | Astros |
| Ryan McDonagh | ON | Milton District | 2024 | RHP | 2024 | NDFA | MARINERS |
| Cole McDonald | IA | New Hampton | 2015 | RHP | 2019 | 15th | Astros |
| Trevor McDonald | MS | George County | 2019 | RHP | 2019 | 11 | Giants |
| Robert McDonnell | IL | Barrington | 2010 | LHP | 2015 | 25 | Dodgers |
| Tyler McDonough | OH | Moeller | 2018 | OF | 2021 | 3 | Boston Red Sox |
| Max McDowell | PA | Norwin | 2012 | C | 2015 | 13 | Brewers |
| Darrien McDowell | FL | J.M. Tate | 2020 | 1B | 2024 | 6 | Padres |
| Micah McDowell | AB | Okotoks Dawgs Academy | 2019 | OF | 2024 | 17 | Marlins |
| Christopher McElvain | TN | Summit | 2019 | RHP | 2022 | 8 | Reds |
| Daniel McElveny | CA | Bonita Vista | 2021 | SS | 2021 | 6 | BOS |
| Jordan McFarland | IL | Waterloo | 2016 | OF | 2016 | 36 | Nationals |
| Alex McFarlane | GA | Habersham Central | 2019 | RHP | 2022 | 4 | Phillies |
| Ky McGary | AZ | Sandra Day O'Connor | 2024 | OF | 2024 | 20 | Astros |
| Haydn McGeary | AZ | Thunderbird | 2018 | C | 2022 | 15 | Cubs |
| Easton McGee | KY | Hopkinsville | 2016 | RHP | 2016 | 4 | Rays |
| Ashton McGee | NC | Charles B. Aycock | 2017 | OF | 2019 | 18 | Milwaukee Brewers |
| Cade McGee | AZ | Salpointe Catholic | 2021 | 3B | 2024 | 9 | Cardinals |
| Liam McGill | RI | South Kingstown | 2016 | C | 2021 | 9 | Atlanta Braves |
| Jonny McGill | BC | J.N. Burnett Secondary | 2020 | SS | 2025 | NDFA | Angels |
| Clayton McGinness | MO | Savannah | 2015 | RHP | 2019 | 20 | Orioles |
| Connor Mcginnis | TX | Hebron | 2021 | RHP | 2025 | 10 | New York Yankees |
| Kevin McGonigle | PA | Bonner-Prendergast | 2023 | SS | 2023 | 1 CB-A | Tigers |
| Jacson McGowan | IN | Brownsburg | 2015 | 3B | 2018 | 11 | Rays |
| Bryce McGowan | NC | Cary | 2018 | RHP | 2021 | 18 | Colorado Rockies |
| Cooper McGrath | MA | Pingree | 2019 | RHP | 2025 | 18 | San Francisco Giants |
| Teddy McGraw | NY | Oneonta | 2020 | RHP | 2023 | 3 | Mariners |
| Michael McGreevy | CA | San Clemente | 2019 | RHP | 2021 | 1 | STL |
| Andy McGuire | VA | Madison | 2013 | SS | 2018 | 28 | Blue Jays |
| Logan McGuire | GA | Allatoona | 2021 | RHP | 2024 | 17 | Guardians |
| Mason McGwire | CA | Capistrano Valley | 2022 | RHP | 2022 | 8 | Cubs |
| Brandon McIlwain | PA | Council Rock North | 2016 | OF | 2019 | 26 | Marlins |
| Paul McIntosh | FL | Dade Christian | 2016 | C | 2021 | Free Agnet | Marlins |
| Donovan McIntyre | IL | Marian Catholic | 2021 | OF | 2021 | 11 | San Francisco Giants |
| Dalton McIntyre | TN | Sacred Heart Of Jesus | 2021 | LHP | 2024 | 19 | Braves |
| Brendan McKay | PA | Blackhawk | 2014 | LHP | 2017 | 1 | Rays |
| Ryan McKay | FL | Satellite Beach | 2015 | RHP | 2015 | 11 | Marlins |
| Cole McKay | TX | Smithson Valley | 2015 | RHP | 2015 | 30 | Detroit Tigers |
| Cooper McKeehan | NC | Weddington | 2019 | LHP | 2022 | 16 | Royals |
| Aaron McKeithan | NC | T.C. Roberson | 2018 | C | 2021 | 16 | St. Louis Cardinals |
| Triston McKenzie | FL | Royal Palm Beach | 2015 | RHP | 2015 | 1 | Indians |
| Jared McKenzie | TX | Round Rock | 2019 | OF | 2022 | 5 | Nationals |
| Briggs McKenzie | NC | Corinth Holders | 2025 | LHP | 2025 | 4 | Atlanta Braves |
| Adam McKillican | BC | Mark R. Isfeld High School | 2018 | - | 2021 | Free Agent | Texas Rangers |
| Jeremy McKinney | IN | Franklin Community | 2013 | RHP | 2017 | 31 | Nationals |