The Ottawa Rough Riders were a Canadian Football League team based in Ottawa, Ontario, founded in 1876. Formerly one of the oldest and longest-lived professional sports teams in North America, the Rough Riders won the Grey Cup championship nine times. Their most dominant era was the 1960s and 1970s, in which they won five Grey Cups. The team's fortunes waned in the 1980s and 1990s, and they ultimately ceased operations following the 1996 season. Five years later, a new CFL team known as the Ottawa Renegades was founded, though they suspended operations in 2006. The Ottawa Redblacks, which own the Rough Riders and Renegades intellectual properties, joined the league in 2014.

The Hamilton Tigers were a Canadian football team based in Hamilton, Ontario that played in the Ontario Rugby Football Union from 1883 to 1906 and 1948 to 1949 and in the Interprovincial Rugby Football Union from 1907 to 1947. The club was a founding member of both the ORFU in 1883 and the IRFU in 1907. Throughout their history, the Tigers won five Grey Cup Championships and two Dominion Championships, including the 1908 title, the year before the Grey Cup was first awarded. After struggling to compete on a sound financial level with the Hamilton Wildcats, who had joined the ORFU in 1941 and later the IRFU, the two clubs merged in 1950 to form the Hamilton Tiger-Cats.