The Hamilton Tigers began play in the Ontario Rugby Football Union (ORFU) in 1883 and won their first Canadian Dominion Football Championship in 1906 when the Tigers beat McGill University 29–3. The Tigers continued in the ORFU until 1907, when the Interprovincial Rugby Football Union (IRFU) was formed. The IRFU later became known as the Big Four and eventually, the IRFU became the East division of the modern CFL in the 1950s. The Tigers faced stiff local competition with the ORFU's Hamilton Alerts who, in 1912, won the City of Hamilton its first Grey Cup, the trophy that was now awarded to the Canadian Dominion Football Champions, by beating the Toronto Argonauts 11–4.