Hap Day entered the NHL with Toronto as a rookie in 1924, where he played at Left Wing, leading the NHL in Assists (17). He would move to Defense afterward, playing competent two-way hockey before becoming a pure lockdown Defenseman in his fourth NHL season.
Day was very good in this role and became a team leader, earning the captaincy in 1926. He would later be paired with the legendary King Clancy, and the two would anchor the Maple Leafs to a Stanley Cup win in 1932. He played for Toronto until his contract was sold to the New York Americans in 1937.
Day returned to Toronto as a Coach, winning five Stanley Cups, and would capture one more as an Assistant General Manager.
The Hockey Hall of Fame inducted Day in 1961, and in 2006, his name was added to the honored greats at Air Canada Center. His number 4 (along with Red Kelly) was retired in 2016.