Major professional sports leagues in the United States and Canada
The Canadian Football League is the highest level of play in Canadian football. The league was organized in 1956 as a cooperative agreement between two regional leagues, the Big Four (which dated to 1907) and the WIFU (which was founded in 1936), and became independent from Football Canada in 1958. The league now consists of nine teams, all based in Canada. The Grey Cup is awarded annually to the champion every November and is the highest attended sporting event in the nation. The oldest extant teams, the Hamilton Tiger-Cats and the Toronto Argonauts, trace their origins to the late 1860s and early 1870s, which ranks them amongst the oldest professional sports teams of any kind still in existence on the continent. The CFL attempted an expansion into the United States in cities that had no NFL team between 1993 and 1995, though the expansion teams all either folded or relocated to Canadian cities.
List of winless seasons
The Canadian Football League currently has a regular season of eighteen games; from 1952 to 1985 it was generally sixteen games as with the current NFL season, though those teams in the Eastern Division played only fourteen as late as 1973. Also, the CFL did not adopt interdivisional regular season play until the early 1960s. Consequently, especially given the much smaller number of teams playing, there have been fewer imperfect seasons than in the National Football League, with the exception of the first decade or so when fewer games were played.