How old were they?

Gary Serum

P · Born October 24, 1956

Age in each season

1. 1977 (Twins): 20 years, 159 days to 20 years, 342 days
2. 1978 (Twins): 21 years, 159 days to 21 years, 342 days
3. 1979 (Twins): 22 years, 159 days to 22 years, 342 days