Sport: Football

Formed: May 24, 1989 Disbanded: June 29, 2007 First Game: March 23, 1991 Last Game: June 23, 2007 Seasons: 15 Franchises: 17 U.S. States &

Formed: February 1965 Disbanded: 1970 (No date of formal announcement) First Game: August 14, 1965 Last Game: December 13, 1969 Seasons: 5 States & Provinces:  Commissioner: March 1965

Formed: January 17, 1958 (By merger of the  Interprovincial Rugby Football Union (IRFU) a.k.a. “Big Four” (founded in 1907) and the Western Interprovincial Football Union

Founded: February 3, 2000 Disbanded: May 10, 2001 First Game: February 3, 2001 Last Game: April 21, 2001 Seasons: 1 States: 8 (Alabama, California, Florida, Illinois,

Formed: October 2, 1973 Disbanded: October 22, 1975 First Game: July 10, 1974 Last Game: October 19, 1975 Seasons: 1.5 States: 13 (AL, CA, FL, HI,