National Softball League was created in 2009.
Vienna Girls Softball League was created in 1965.
National Softball Association Hall of Fame was created in 1992.
National League A was created in 1999.
National Security League was created in 1914.
A-League National Youth League was created in 2008.
Speedway National League Division Three was created in 1947.
National Rugby League was created in 1997.
National Puzzlers' League was created in 1883.
National League West was created in 1969.
National Dodgeball League was created in 2004.
Belgian National League was created in 1975.
National Socialist League was created in 1937.