After Harold Ballard took control of the Leafs during the 1971–72 season, Clancy and Ballard became inseparable friends. Former Leafs player, coach, and assistant general manager Hap Day would say that Clancy was paid to do nothing by both Smythe and Ballard. During the 1971–72 season, Clancy stepped behind the Leafs' bench as acting coach for 15 games while head coach John McLellan recovered from a peptic ulcer. Clancy remained in the Leafs' front office for the rest of his life.