For the sake of simplicity, this list will only focus on national (non-regional, non-National Football League) outdoor (i.e., not arena football or leagues with similar rules) North American football teams not covered in other lists; i.e., the All-America Football Conference, the first three universally recognized as major incarnations of the American Football League, Continental Football League, World Football League, American Football Association, United States Football League, non-European teams from the World League of American Football, Canadian Football League (including predecessors and South Division teams), the 2001 XFL, and the Alliance of American Football; that played at least one game. As a general rule, only teams with existing Wikipedia articles are listed here.