American soccer writing, history & data.
| Team | Location | Years |
|---|---|---|
| M. Shaivitz & Sons | Baltimore, MD | 1937–1939 |
| Maccabee Sport Club | Milwaukee, WI | 1930–1930 |
| MacWhyte | Kenosha, WI | 1913–1917 |
| MacWhyte | Kenosha, WI | 1919–1925 |
| MacWhyte | Kenosha, WI | 1926–1927 |
| Madison Badger S.C. | Madison, WI | 1931–1935 |
| Madison Freeze | Madison, WI | 1996–1998 |
| Madison Kennel Club | St. Louis, MO | 1928–1930 |
| Madison S.C. | Madison, WI | 1930–1933 |
| Madison S.C. | Madison, WI | 1957–1969 |
| magicJack | Boca Raton, FL | 2011–2011 |
| Manewals | St. Louis, MO | 1914–1915 |
| Marres | St. Louis, MO | 1934–1936 |
| Martin Bomber S.C. | Middle River, MD | 1943–1946 |
| Maryland Bays | Columbia, MD | 1987–1990 |
| Maryland Bays | Columbia, MD | 1991–1991 |
| Maryland Bobcats FC | Boyds, MD | 2019 |
| Maryland-Germans | Baltimore, MD | 1937–1938 |
| Maryland Germans | Baltimore, MD | 1940–1940 |
| Maryland Mania | Catonsville, MD | 1999–1999 |
| Maryland Pride | Catonsville, MD | 1996–2006 |
| Massachusetts Bay Crusaders | Dartmouth, MA | 1995–1995 |
| Maydaks | Milwaukee, WI | 1938–1938 |
| McMahon Pontiac Co. | St. Louis, MO | 1949–1950 |
| Memphis Americans | Memphis, TN | 1981–1984 |
| Memphis Jackals | Memphis, TN | 1993–1994 |
| Memphis Rogues | Memphis, TN | 1978–1980 |
| Memphis Rogues | Memphis, TN | 1989–1990 |
| Memphis Rogues | Memphis, TN | 1990–1991 |
| Memphis Storm | Memphis, TN | 1986–1989 |
| Memphis Survivors | Memphis, TN | 1991–1992 |
| Memphis United Express F.C. | Memphis, TN | 1992–1992 |
| Merchant Ship F.C. | Harriman, PA | 1918–1920 |
| Mesquite Kickers | Mesquite, TX | 1994–1997 |
| MetroStars | East Rutherford, NJ | 1998–2005 |
| Mexico Bajas | Ensenada | 1992–1993 |
| Mexico Toros | Mexico City | 1995–1995 |
| Miami Americans | Miami, FL | 1980–1980 |
| Miami Breakers | Miami, FL | 1997–2000 |
| Miami FC | Miami, FL | 2016 |
| Miami Freedom | Miami, FL | 1990–1992 |
| Miami Fusion F.C. | Miami, FL | 1998–2001 |
| Miami Gatos | Miami, FL | 1972–1972 |
| Miami Gliders | Miami, FL | 1998–1999 |
| Miami Sharks | Miami, FL | 1988–1989 |
| Miami Tango | Miami, FL | 1996–1999 |
| Miami Toros | Miami, FL | 1973–1976 |
| Michigan Madness | Ann Arbor, MI | 1996–1997 |
| Michigan Stars FC | Washington, MI | 2014 |
| Mid-Cities Flyers | Euless, TX | 1991–1992 |
| Mid Michigan Bucks | Saginaw, MI | 1996–2003 |
| Mike Breheny Furniture Co. | St. Louis, MO | 1949–1953 |
| Miller High Lifes | Milwaukee, WI | 1935–1936 |
| Milwaukee All-Stars | Milwaukee, WI | 1919–1920 |
| Milwaukee Brewers S.C. | Milwaukee, WI | 1947–2013 |
| Milwaukee Brewers S.C. 2nd | Milwaukee, WI | 1954–1969 |
| Milwaukee Brewers S.C. 3rd | Milwaukee, WI | 1956–1957 |
| Milwaukee Hungarian A.C. | Milwaukee, WI | 1923–1948 |
| Milwaukee Hungarian A.C. 2nd | Milwaukee, WI | 1923–1938 |
| Milwaukee Hungarian A.C. 3rd | Milwaukee, WI | 1925–1925 |
| Milwaukee Packers | Milwaukee, WI | 1934–1935 |
| Milwaukee Rampage | Milwaukee, WI | 1993–2002 |
| Milwaukee Sport Club | Milwaukee, WI | 1923–1926 |
| Milwaukee Sport Club | Milwaukee, WI | 1953 |
| Milwaukee Sport Club 2nd | Milwaukee, WI | 1925–1925 |
| Milwaukee Sport Club 2nd | Milwaukee, WI | 1955–1969 |
| Milwaukee Sport Club 3rd | Milwaukee, WI | 1956–1960 |
| Milwaukee Thistles | Milwaukee, WI | 1926–1929 |
| Milwaukee Vikings A.C. | Milwaukee, WI | 1924–1940 |
| Milwaukee Wave | Milwaukee, WI | 1984 |
| Minerva-Pfaelzer S.C. | Franklin Square, NY | 1963–1967 |
| Minit-Rub Stars | St. Louis, MO | 1933–1934 |
| Minnesota Kicks | Bloomington, MN | 1976–1981 |
| Minnesota Strikers | Bloomington, MN | 1984–1988 |
| Minnesota Thunder | Blaine, MN | 1990–2009 |
| Minstrels | St. Louis, MO | 1905–1907 |
| Mississippi Beach Kings | Biloxi, MS | 1998–1998 |
| Missouri Naval Reserves | St. Louis, MO | 1915–1918 |
| Mobile Revelers | Mobile, AL | 1995–1997 |
| Monterey Bay Jaguars | Salinas, CA | 1995–1995 |
| Monterrey La Raza | Monterrey | 1993–2000 |
| Montgomery Capitals | Montgomery, AL | 1993–1993 |
| Montreal Impact | Montreal, QC | 1992–2011 |
| Montreal Manic | Montreal, QC | 1981–1983 |
| Montreal Olympique | Montreal, QC | 1971–1973 |
| Montreal Ramblers | Montreal, QC | 1995–1995 |
| Moore Shipyards | Oakland, CA | 1918–1921 |
| Morgan Haulers | St. Louis, MO | 1927–1928 |
| Morgan Strasser F.C. | Morgan, PA | 1931–1947 |
| Morse Dry Dock F.C. | Brooklyn, NY | 1917–1920 |
| Morstein Jewelers | Baltimore, MD | 1940–1954 |
| Myrtle Beach Boyz | Myrtle Beach, SC | 1995–1996 |
| Myrtle Beach SeaDawgs | Myrtle Beach, SC | 1997–1999 |