Catholic League - U.S. - was created in 1973.
League of Catholic Women Building was created in 1927.
National Catholic Forensic League was created in 1951.
League for Catholic Counter-Reformation was created in 1967.
General League of Roman Catholic Caucuses was created in 1905.
Leninist League - US - was created in 1938.
Spartacist League - US - was created in 1964.
United States Football League was created in 1982.
United States Chess League was created in 2005.
United States Baseball League was created in 1912.
United States Hockey League was created in 1947.
United States Basketball League was created in 1985.
General League of Roman Catholic Caucuses ended in 1926.