The Calgary Stampeders are a professional Canadian football team based in Calgary, Alberta, competing in the West Division of the Canadian Football League (CFL). The Stampeders play their home games at McMahon Stadium and are the third-oldest active franchise in the CFL. The Stampeders were officially founded in 1935 as the Calgary Bronks, although there were clubs in Calgary as early as 1909. The team officially became known as the Stampeders in 1945.