Professional football in Canada
Only one professional football league has a permanent presence in Canada: the Canadian Football League (CFL), an organization founded in 1958 to accommodate the ongoing trend of professionalism in the Canadian football ranks since the 1940s. The CFL, like most amateur Canadian football leagues, plays on a larger field using a rulebook with several significant rule differences compared to the game as it is played in the United States. The league is composed of two divisions and nine teams in most of the largest Canadian markets, with at least one team in each province between British Columbia (BC Lions) and Quebec (Montreal Alouettes) inclusive. The only presence in Atlantic Canada is a semi-regular series of games in Moncton (Touchdown Atlantic) and a smattering of earlier preseason contests. The CFL operates a two-week preseason beginning in June, an 18-game season from July to October, and a six-team playoff tournament, culminating in the Grey Cup on the fourth weekend of November.
Major professional sports leagues in the United States and Canada
The CFL had a total of six teams in the United States over a three-year period between 1993 and 1995, all in medium-sized markets that lacked an NFL team at the time; of the seven markets those teams occupied, three (Baltimore, San Antonio and Sacramento) had other major league franchises at the time, and two would later receive a major team (Memphis and Las Vegas). The league also played occasional games in the United States in the 1950s and 1960s.