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.
Canadian Soccer League
After the demise of the Canadian Soccer League (CSL) in 1992 Canada was without a Division I national professional league. The Canadian soccer landscape was fractured into several different foreign and regional senior leagues. When the CSL ceased operations three of their clubs the Vancouver Whitecaps, Toronto Blizzard, and Montreal Supra joined the American Professional Soccer League, which at the time constituted as the highest tier league in the Canadian soccer structure. While the remaining clubs with the exception of London Lasers joined the National Soccer League (NSL) the country's oldest and only exclusively Canadian professional league. After the addition of the Winnipeg Fury it changed its name to the Canadian National Soccer League (CNSL).