How old were they?

Ken Harrelson

1B · Born September 4, 1941

Age in each postseason series

1. 1967 World Series (October 4, 1967), Red Sox vs Cardinals 3–4: 26 years, 30 days

Age in each season

1. 1963 (Athletics): 21 years, 209 days to 22 years, 27 days
2. 1964 (Athletics): 22 years, 210 days to 23 years, 27 days
3. 1965 (Athletics): 23 years, 209 days to 24 years, 27 days
4. 1966 (Senators, Athletics): 24 years, 209 days to 25 years, 27 days
5. 1967 (Athletics, Senators, Red Sox): 25 years, 209 days to 26 years, 27 days
6. 1968 (Red Sox): 26 years, 210 days to 27 years, 27 days
7. 1969 (Indians, Red Sox): 27 years, 209 days to 28 years, 27 days
8. 1970 (Indians): 28 years, 209 days to 29 years, 27 days
9. 1971 (Indians): 29 years, 209 days to 30 years, 27 days