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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MacDougal, Steve | SP | Hamilton Thunderbirds | 33 | 06/25/2022 | Millington | USA | Right | Right | 6' 0" | 185 lbs | - |
| MacKissock, Tom | SP | Free Agent | 32 | 02/21/2023 | Rexburg | USA | Left | Left | 6' 1" | 195 lbs | - |
| Maejima, Koryusai | 1B | Hartford Pride | 34 | 04/29/2021 | Fujisawa | JPN | Right | Right | 6' 0" | 200 lbs | - |
| Manning, Xavier | SP | Norfolk Pajaritos | 26 | 11/11/2029 | Moore | USA | Right | Right | 6' 2" | 210 lbs | - |
| Marino, Ramón | 3B | Monongahela Monsters | 31 | 02/28/2024 | Cardenas | CUB | Switch | Right | 6' 0" | 195 lbs | - |
| Martin, Bill | 3B | Hamilton Thunderbirds | 28 | 03/13/2027 | New York | USA | Right | Right | 6' 0" | 205 lbs | - |
| Martí, Juan Andrés | 3B | Pawnee ParksNRec | 36 | 08/03/2019 | Santiago | DOM | Left | Right | 6' 0" | 195 lbs | $10,000,000 |
| Martínez, Raúl | SP | Hamilton Thunderbirds | 33 | 05/02/2022 | Freeport | USA | Right | Right | 5' 10" | 200 lbs | - |
| McBride, Bake | CF | Ellenburg Fighting Dachshunds | 30 | 08/30/2025 | Plant City | USA | Right | Right | 6' 0" | 200 lbs | - |
| McCarthy, Kelly | SP | Sunset District Fog | 26 | 06/05/2029 | New York | USA | Right | Right | 6' 0" | 195 lbs | - |
| McCarthy, Spencer | SP | Sunset District Fog | 25 | 01/09/2030 | Tucson | USA | Right | Right | 5' 10" | 185 lbs | - |
| McClure, Ambrose | RP | Ellenburg Fighting Dachshunds | 33 | 09/26/2022 | San Antonio | USA | Right | Right | 6' 1" | 200 lbs | - |
| McConnell, Ray | RF | Pawnee ParksNRec | 23 | 11/28/2032 | East Haddam | USA | Left | Left | 6' 4" | 200 lbs | $280,000 |
| McDonald, Jeff | 2B | Ellenburg Fighting Dachshunds | 29 | 08/08/2026 | Cleveland | USA | Right | Right | 5' 10" | 185 lbs | - |
| McKee, Dusty | SP | Hartford Pride | 30 | 03/03/2025 | Long View | USA | Left | Left | 6' 4" | 200 lbs | - |
| McKinney, Mike | CF | Port Huron Blitzkrieg | 26 | 12/29/2029 | Fullerton | USA | Right | Right | 6' 2" | 200 lbs | - |
| McKnight, Arnie | RF | Monongahela Monsters | 26 | 11/19/2029 | Fremont | USA | Left | Left | 5' 10" | 175 lbs | - |
| Mcquade, Jayden | SP | Monongahela Monsters | 27 | 05/04/2028 | Scranton | USA | Left | Left | 6' 3" | 200 lbs | - |
| Medrano, Jim | 1B | Ellenburg Fighting Dachshunds | 32 | 08/23/2023 | Charlottesville | USA | Left | Left | 6' 2" | 200 lbs | $280,000 |
| Mendoza, Ramón | RP | Pawnee ParksNRec | 29 | 11/01/2026 | Dangriga | BLZ | Left | Right | 6' 4" | 200 lbs | - |
| Mermea, Juan | RP | Hartford Pride | 27 | 03/01/2028 | Apopa | SLV | Right | Right | 6' 4" | 205 lbs | - |
| Merza, Armando | LF | Norfolk Pajaritos | 24 | 05/31/2031 | Quetzaltenango | GUA | Left | Left | 6' 5" | 200 lbs | $280,000 |
| Middleton, Walt | SP | Norfolk Pajaritos | 29 | 03/26/2026 | Tulsa | USA | Right | Left | 6' 2" | 200 lbs | - |
| Miranda, António | SP | Kansas Rainbeaus | 25 | 05/19/2030 | Longview | USA | Left | Left | 6' 5" | 210 lbs | - |
| Miranda, Raúl | 1B | Kansas Rainbeaus | 32 | 04/09/2023 | Palmira | COL | Left | Left | 6' 4" | 205 lbs | $1,400,000 |
| Mondragon, José | LF | Alaskan Humpbacks | 23 | 07/31/2032 | Bogota | COL | Left | Left | 6' 0" | 180 lbs | - |
| Montoya, Pablo | SP | Port Huron Blitzkrieg | 33 | 05/17/2022 | Guaynabo | PUR | Right | Right | 6' 4" | 200 lbs | - |
| Montáñez, Luis | RP | Port Huron Blitzkrieg | 29 | 07/27/2026 | Philadelphia | USA | Left | Right | 6' 2" | 185 lbs | - |
| Moore, William | 2B | Ellenburg Fighting Dachshunds | 33 | 12/07/2022 | Omaha | USA | Right | Right | 5' 10" | 200 lbs | - |
| Morales, Juan | RP | Hartford Pride | 29 | 02/27/2026 | Tlalnepantla | MEX | Left | Left | 5' 9" | 170 lbs | - |
| Morales, Lorenzo | CF | Hamilton Thunderbirds | 32 | 04/16/2023 | Virginia Beach | USA | Right | Right | 5' 11" | 200 lbs | $280,000 |
| Moreno, Júlio | CF | Free Agent | 28 | 11/21/2027 | Belize | BLZ | Left | Right | 6' 0" | 200 lbs | - |
| Morris, Joe | SP | Ellenburg Fighting Dachshunds | 32 | 09/04/2023 | Staten Island | USA | Switch | Right | 6' 6" | 210 lbs | - |
| Morris, Kevin | RF | Port Huron Blitzkrieg | 24 | 01/03/2031 | Dentsville | USA | Right | Left | 6' 2" | 190 lbs | $280,000 |
| Morrison, Garth | LF | Pawnee ParksNRec | 31 | 09/04/2024 | Clarendon | USA | Right | Right | 5' 10" | 195 lbs | - |
| Morse, Ethan | RP | Hamilton Thunderbirds | 30 | 04/03/2025 | Somerset | USA | Right | Right | 6' 2" | 200 lbs | $280,000 |
| Moss, Jamie | CF | Free Agent | 29 | 06/04/2026 | Houston | USA | Left | Right | 6' 1" | 200 lbs | - |
| Mrevlishvili, Vladmir | 3B | Sunset District Fog | 24 | 06/29/2031 | Krasnodar | RUS | Left | Right | 6' 4" | 195 lbs | - |
| Mun, Kyung-un | 2B | Sunset District Fog | 27 | 05/10/2028 | Seoul | KOR | Right | Right | 6' 3" | 200 lbs | - |
| Murphy, Eugene | LF | Free Agent | 24 | 03/09/2031 | Merced | USA | Right | Right | 6' 7" | 205 lbs | - |
| Murphy, Phil | RP | Sunset District Fog | 25 | 01/26/2030 | Alamo | USA | Right | Right | 6' 2" | 200 lbs | - |
| Muñóz, Jorge | SS | Free Agent | 37 | 11/11/2018 | Maracaibo | VEN | Right | Right | 6' 2" | 205 lbs | - |
| Méndez, Ricardo | SP | Free Agent | 29 | 01/29/2026 | Los Angeles | USA | Right | Right | 6' 2" | 200 lbs | - |
