How old were they?

Billy Smith

P · Born September 13, 1954

Age in each postseason series

1. 1981 NL West Division Series (October 6, 1981), Astros vs Dodgers 2–3: 27 years, 23 days

Age in each season

1. 1981 (Astros): 26 years, 200 days to 27 years, 18 days