On March 19, 1970, Bower publicly announced his retirement, four months after his 45th birthday. He played eleven full seasons with the Leafs. When asked if he might reveal his true age, he replied "If you don't know by now, you never will". Coach Punch Imlach once told Bower, after seeing a purported birth certificate, "If you were born in this day here that you're telling me, you had to be overseas with the First Division, in 1939, when you were 13." Bower eventually revealed his birth date as November 8, 1924.