How old were they?

Dennis O'Brien

D · Born June 10, 1949

Age in each postseason series

1. 1971 Quarterfinals (April 7, 1971), North Stars vs Blues 4–2: 21 years, 301 days
2. 1971 Semifinals (April 20, 1971), North Stars vs Canadiens 2–4: 21 years, 314 days
3. 1972 Quarterfinals (April 5, 1972), North Stars vs Blues 3–4: 22 years, 300 days
4. 1973 Quarterfinals (April 4, 1973), North Stars vs Flyers 2–4: 23 years, 298 days
5. 1977 Preliminary round (April 5, 1977), North Stars vs Sabres 0–2: 27 years, 299 days
6. 1978 Quarterfinals (April 17, 1978), Bruins vs Blackhawks 4–0: 28 years, 311 days
7. 1978 Semifinals (May 2, 1978), Bruins vs Flyers 4–1: 28 years, 326 days
8. 1978 Stanley Cup Final (May 13, 1978), Bruins vs Canadiens 2–4: 28 years, 337 days

Age in each season

1. 1970-71 (North Stars): 21 years, 113 days to 21 years, 324 days
2. 1971-72 (North Stars): 22 years, 113 days to 22 years, 325 days
3. 1972-73 (North Stars): 23 years, 113 days to 23 years, 324 days
4. 1973-74 (North Stars): 24 years, 113 days to 24 years, 324 days
5. 1974-75 (North Stars): 25 years, 113 days to 25 years, 324 days
6. 1975-76 (North Stars): 26 years, 113 days to 26 years, 325 days
7. 1976-77 (North Stars): 27 years, 113 days to 27 years, 324 days
8. 1977-78 (Bruins, Barons, Rockies, North Stars): 28 years, 113 days to 28 years, 324 days
9. 1978-79 (Bruins): 29 years, 113 days to 29 years, 324 days
10. 1979-80 (Bruins): 30 years, 113 days to 30 years, 325 days