Irish Worker League was created in 1923.
United Irish League was created in 1898.
Irish League Cup was created in 1986.
Irish National League was created in 1882.
Irish Dominion League was created in 1919.
Irish Ice Hockey League was created in 2007.
Irish Anti-Partition League was created in 1945.
Irish American Baseball Hall of Fame was created in 2008.
Minor league baseball was created in 1901.
Australian Baseball League was created in 2009.
Western Baseball League was created in 1994.
Intercounty Baseball League was created in 1919.