How old were they?

Trevor Johansen

D · Born March 30, 1957

Age in each postseason series

1. 1978 Preliminary round (April 11, 1978), Maple Leafs vs Kings 2–0: 21 years, 12 days
2. 1978 Quarterfinals (April 17, 1978), Maple Leafs vs Islanders 4–3: 21 years, 18 days
3. 1978 Semifinals (May 2, 1978), Maple Leafs vs Canadiens 0–4: 21 years, 33 days

Age in each season

1. 1977-78 (Maple Leafs): 20 years, 185 days to 21 years, 31 days
2. 1978-79 (Rockies, Maple Leafs): 21 years, 185 days to 22 years, 31 days
3. 1979-80 (Rockies): 22 years, 185 days to 23 years, 31 days
4. 1980-81 (Rockies): 23 years, 185 days to 24 years, 31 days
5. 1981-82 (Kings, Maple Leafs): 24 years, 185 days to 25 years, 31 days