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.
Canadian Championship
The Canadian Championship is a club soccer competition organized by the Canadian Soccer Association. The championship determines Canada's entry in the annual CONCACAF Champions League. Fully professional Canadian soccer teams play in United States-based leagues. Prior to the creation of the official competition in 2008, there was no domestic competition to determine the best Canadian professional team (as Canada Soccer's Challenge Trophy only crowned the best amateur team). An unofficial Canadian Champion determined in the same manner as 2008–2010, a home-and-away series with the games taken from USL First Division (USL-1) regular season league games, was awarded by the Canadian national teams' supporters group, The Voyageurs. This unofficial Canadian Championship became less legitimate when Toronto was awarded a Major League Soccer (MLS) franchise to start play in 2007 in the USSF Division 1 MLS league above the USSF Division 2 USL-1 league. Toronto's USL-1 team self relegated, while the other two Canadian professional soccer teams did not play meaningful games against the new MLS team in 2007.