- Maas, Kevin
- Maddux, Greg
- Majewski, Val
- Malek, Bob
- Manning, Peyton
- Mantle, Mickey
- Manwaring, Kirt
- Mariners, Seattle
- Maris, Roger
- Martinez, Tino
- Martinez, Edgar
- Martinez, Pedro
- Martinez, Chito
- Matheny, Mike
- Mattingly, Don
- Maureau, Justin
- May, Lee
- May, Milt
- Mays, Willie
- Mazzilli, Lee
- McCatty, Steve
- McCovey, Willie
- McCutcheon, Andrew
- McDowell, Jack
- McGee, Willie
- McGriff, Fred
- McGuire, Deck
- McGwire, Mark
- McGwire Mark,
- McKay, Dave
- McLemore, Mark
- McMillon, Billy
- McReynolds, Kevin
- Militello, Sam
- Minton, Greg
- Mitchell, Kevin
- Mize, Johnny
- Molitor, Paul
- Monday, Rick
- Morales, Franklin
- Morandini, Mickey
- Moreland, Keith
- Morgan, Joe
- Morris, Jack
- Morton, Charlie
- Murphy, Dale
- Murray, Eddie
- Murray, Josh
- Musial, Stan
- Musial Stan,
- Mussina, Mike