Mahoning Valley Hitmen (EIFL - 2007)
Maryland Conquistadors (EIFL)
Maryland Terrapins (NCAA-BCS-ACC - 1930-present)
Memphis Maniax (XFL - 2001)
Memphis Southmen (WFL - 1974-1975)
Miami Hurricanes (NCAA-BCS-ACC - 1930-present)
Miami Silverbacks (2006)
Mid-American Buzzards (EIFL - 2007)
Mississippi Mudcats (AIFA - 2007-2008)
Montgomery Bears (AIFA - 2007)
Montreal Machine (WLAF - 1991-1992)