He played senior hockey for the Verdun Maple Leafs in 1937-38 and then jumped to the Montreal Canadiens the following season. In his rookie year, 1938-39, Summerhill scored 16 points and found himself in the minors the next season. The Brooklyn Americans obtained him in 1941 and he scored 10 points in 16 games but again was relgated to the minors. He spent from 1943 to 1945 playing senior hockey in the Toronto area. He spent six seasons from 1945 to 1951 in the minor pros and retired in 1951. In the NHL, Summerhill scored 14 goals and 17 assists in 72 games.