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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Magana, Bob | C | Ogden Raptors | 23 | 11/12/2023 | La Victoria | DOM | Right | Right | 6' 1" | 200 lbs | - |
| Maguire, Zach | 2B | San Francisco (APP) Giants | 20 | 09/07/2026 | Hendersonville | USA | Right | Right | 6' 5" | 200 lbs | - |
| Maldonado, Domingo | RP | Seattle (APP) Mariners | 18 | 07/15/2028 | Hidalgo | MEX | Right | Right | 6' 7" | 210 lbs | - |
| Manriquez, Carlos | 3B | Cleveland (APP) Indians | 22 | 03/25/2024 | Torreón | MEX | Right | Right | 6' 2" | 200 lbs | - |
| Marino, Justin | SS | Helena Brewers | 21 | 09/09/2025 | Greenville | USA | Right | Right | 6' 4" | 195 lbs | - |
| Markle, Bob | SP | Bluefield Blue Jays | 19 | 08/31/2027 | Toronto | CAN | Right | Right | 6' 6" | 190 lbs | - |
| Mata, Jose | SP | Chicago (APP) Cubs | 19 | 06/23/2027 | Cúcuta | COL | Right | Right | 6' 1" | 190 lbs | - |
| Mata, Mario | SP | Seattle (APP) Mariners | 18 | 12/22/2028 | Panama | PAN | Right | Right | 5' 11" | 185 lbs | - |
| Matson, Nate | C | Elizabethton Twins | 21 | 08/23/2025 | Kuna | USA | Right | Right | 6' 0" | 205 lbs | - |
| Matsui, Toyotoshi | RP | Great Falls Voyagers | 19 | 11/15/2027 | Neyagawa | JPN | Right | Right | 6' 0" | 170 lbs | - |
| Matsumoto, Minoru | 1B | Baltimore (APP) Orioles | 19 | 02/28/2027 | Higashiosaka | JPN | Right | Right | 6' 4" | 195 lbs | - |
| Matthews, William | C | Billings Mustangs | 23 | 10/28/2023 | Anna's Retreat | VIR | Left | Right | 6' 0" | 200 lbs | - |
| McClellan, David | SS | Elizabethton Twins | 22 | 09/07/2024 | Santa Clara | USA | Right | Right | 6' 2" | 190 lbs | - |
| McDonald, David | 2B | Elizabethton Twins | 20 | 09/30/2026 | Mission Bend | USA | Right | Right | 6' 1" | 200 lbs | - |
| McFadden, Phil | C | San Diego (APP) Padres | 21 | 10/31/2025 | Danville | USA | Right | Right | 6' 3" | 205 lbs | - |
| McGuirk, Chris | C | Baltimore (APP) Orioles | 21 | 08/18/2025 | Lumberton Township | USA | Right | Right | 5' 10" | 180 lbs | - |
| McLane, Vince | RF | Washington (APP) Nationals | 23 | 06/09/2023 | New York | USA | Left | Left | 6' 1" | 200 lbs | - |
| McPhee, Larry | SP | Billings Mustangs | 21 | 04/23/2025 | Markham | CAN | Right | Right | 6' 0" | 185 lbs | - |
| McWilliams, Chance | LF | Washington (APP) Nationals | 22 | 09/06/2024 | Applewood | USA | Left | Left | 6' 2" | 200 lbs | - |
| Medina, Juan | 1B | Kingsport Mets | 19 | 12/02/2027 | Santiago | DOM | Right | Right | 6' 0" | 195 lbs | - |
| Medina, Pablo | SP | Philadelphia (APP) Phillies | 19 | 01/17/2027 | Pedregal | PAN | Right | Right | 6' 4" | 190 lbs | - |
| Mejia, Alex | LF | Ogden Raptors | 24 | 07/28/2022 | Albuquerque | USA | Right | Right | 6' 2" | 200 lbs | - |
| Mejicanos, Ricky | LF | Orem Owlz | 20 | 11/25/2026 | San Juan | PUR | Right | Right | 6' 3" | 200 lbs | - |
| Melendez, Alex | C | Boston (APP) Red Sox | 21 | 06/16/2025 | Aurora | USA | Right | Right | 6' 2" | 200 lbs | - |
| Melgoza, Alex | 3B | Johnson City Cardinals | 23 | 12/17/2023 | Artemisa | CUB | Right | Right | 6' 3" | 205 lbs | - |
| Mena, Ramon | RP | Philadelphia (APP) Phillies | 20 | 08/20/2026 | Havana | CUB | Right | Right | 6' 2" | 190 lbs | - |
| Mendoza, Jonathan | RF | Baltimore (APP) Orioles | 20 | 02/20/2026 | Surprise | USA | Right | Right | 6' 4" | 200 lbs | - |
| Mendoza, Manny | RP | Washington (APP) Nationals | 19 | 10/25/2027 | Managua | NCA | Left | Right | 6' 4" | 185 lbs | - |
| Mendoza, Ruben | RP | Seattle (APP) Mariners | 18 | 12/19/2028 | Cali | COL | Right | Right | 6' 4" | 180 lbs | - |
| Menjivar, Jesus | SS | Helena Brewers | 23 | 12/07/2023 | Tlalnepantla | MEX | Right | Right | 6' 4" | 200 lbs | - |
| Middelkoop, Lothar | SS | Bluefield Blue Jays | 23 | 04/26/2023 | Ouder-Amstel | NED | Left | Right | 6' 1" | 195 lbs | - |
| Miles, Bobby | CF | Johnson City Cardinals | 20 | 09/04/2026 | San Jose | USA | Right | Right | 6' 4" | 190 lbs | - |
| Milhouse, Ken | RP | Burlington Royals | 22 | 04/21/2024 | Springfield | USA | Left | Left | 5' 10" | 170 lbs | - |
| Miller, Amari | SP | Great Falls Voyagers | 20 | 08/25/2026 | New York | USA | Left | Left | 6' 4" | 200 lbs | - |
| Mintz, Steve | RP | Ogden Raptors | 25 | 12/15/2021 | Peoria | USA | Right | Right | 6' 3" | 195 lbs | - |
| Mitchell, Aidan | RP | Miami (APP) Marlins | 20 | 09/07/2026 | Clinton | USA | Right | Right | 5' 9" | 165 lbs | - |
| Molchan, Tim | C | Danville Braves | 22 | 04/18/2024 | Brooklyn | USA | Right | Right | 6' 2" | 200 lbs | - |
| Moltke, Axel | 2B | Miami (APP) Marlins | 22 | 12/01/2024 | Monsey | USA | Right | Right | 6' 3" | 200 lbs | - |
| Montalvo, Shane | 1B | Cleveland (APP) Indians | 21 | 05/07/2025 | Willingboro Township | USA | Left | Left | 6' 0" | 185 lbs | - |
| Montelongo, Miguel | RP | Elizabethton Twins | 19 | 08/10/2027 | Santiago de Cuba | CUB | Right | Right | 6' 0" | 160 lbs | - |
| Montgomery, Curtis | C | Danville Braves | 18 | 01/16/2028 | Olathe | USA | Right | Right | 6' 1" | 195 lbs | - |
| Mooney, Tom | SP | Chicago (APP) Cubs | 20 | 08/25/2026 | Solana | USA | Left | Left | 6' 2" | 185 lbs | - |
| Moore, Joel | 1B | Philadelphia (APP) Phillies | 21 | 02/21/2025 | Newport | USA | Left | Left | 6' 4" | 200 lbs | - |
| Moore, Kyle | SP | Detroit (APP) Tigers | 21 | 07/03/2025 | Anaheim | USA | Right | Right | 6' 4" | 200 lbs | - |
| Mora, Jonathan | 1B | Missoula Osprey | 23 | 09/24/2023 | Guadalajara | MEX | Right | Right | 6' 5" | 215 lbs | - |
| Morales, Omar | RP | Helena Brewers | 23 | 04/08/2023 | Guatemala | GUA | Switch | Right | 6' 3" | 200 lbs | - |
| Morin, Calvin | RF | Miami (APP) Marlins | 23 | 02/18/2023 | Saint-Pascal | CAN | Right | Left | 6' 3" | 200 lbs | - |
| Morrison, Joey | RP | Free Agent | 25 | 11/02/2021 | Newark | USA | Right | Right | 5' 11" | 180 lbs | - |
| Morse, Jim | RP | Johnson City Cardinals | 18 | 10/27/2028 | Brockville | CAN | Right | Right | 6' 1" | 170 lbs | - |
| Moser, Kyle | SP | Kingsport Mets | 19 | 10/19/2027 | Savannah | USA | Right | Right | 6' 3" | 175 lbs | - |
| Mulligan, Erik | 3B | Bristol Pirates | 21 | 01/05/2025 | Central Falls | USA | Right | Right | 6' 2" | 190 lbs | - |
| Muns, Dan | C | Bluefield Blue Jays | 22 | 01/12/2024 | Saginaw | USA | Right | Right | 6' 1" | 210 lbs | - |
| Musico, Geoff | C | Johnson City Cardinals | 23 | 10/22/2023 | New York | USA | Right | Right | 6' 2" | 200 lbs | - |
| Mustafa, Yusufu | SP | Great Falls Voyagers | 23 | 07/07/2023 | Omaweneno | BOT | Left | Left | 6' 5" | 200 lbs | - |
| Mwara, Ighlas | CF | Cleveland (APP) Indians | 22 | 10/12/2024 | Addis Abeba | ETH | Right | Right | 6' 3" | 200 lbs | - |
