From Longman Dictionary of Contemporary EnglishRugby LeagueˌRugby ˈLeague noun [uncountable] DSOa type of rugby played by teams of 13 players
Examples from the Corpus
Rugby League• The opening home game is against Rome on April 16. Rugby League.• Many players are involved in both games; Rugby League and Rugby Union.• He's already put them to good use at Halifax Rugby League club where he enjoyed four years of success.• A promising Rugby League career was shelved.• Hanson reported, for example, that Wigan Rugby League players frequently played after having been given pain-killing injections. 