Editing Rugby league (section)

=== Comparison with gridiron codes ===
{{main|Comparison of American football and rugby league|Comparison of Canadian football and rugby league}}
Much more so than rugby union, rugby league shares significant similarities with North American [[Gridiron football|gridiron]] codes. Although described as evolving from both rugby and [[association football]], the basic structures of American and Canadian football are remarkably similar to rugby league through a process of parallel evolution: a try-and-goal based scoring system, a set number of plays before handover of the football, each play restarting from a set piece position and ended by a tackle. Although the [[Canadian Football League]] in particular maintained the word 'rugby' in its name for many years, alluding to that shared past, the introduction of the [[forward pass]] and [[unlimited substitution]] in North American games created a fundamentally different species of game from either original rugby code. Although the historic link between the codes continues to be acknowledged, neither Canadian or American football is commonly considered a rugby code today except in the broadest sense, and are more commonly referred to collectively as gridiron codes, or simply as 'football' within their respective countries.