United States Baseball League was created in 1912.
United Hockey League was created in 1991.
United Irish League was created in 1898.
United Basketball League was created in 2006.
United Soccer League was created in 1984.
VTB United League was created in 2008.
United Indoor Football League was created in 2010.
United Soccer League of Pennsylvania was created in 1959.
Navy League of the United States was created in 1902.
Economic League - United Kingdom - was created in 1919.
United Regional Basketball League was created in 2004.
United Counties Football League was created in 1934.