He competed at the 1932, 1948 and 1952 Olympics and won a bronze medal in the 10000 m in 1932, placing fourth in the 500 m and 1500 m and seventh in the 5000 m events.

[1] Stack took up skating at the age of 13, following his father Jack, who was also a competitive speed skater.

He semi-retired in 1954, but returned to competitions in 1966, aged 60, and had five podium finishes at the Canadian Indoor Championships.

While competing Stack worked as a speed skating coach and prepared the national team to the 1952 and 1960 Winter Olympics.

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