How old were they?

Heinie Zimmerman

3B · Born February 9, 1887

Age in each postseason series

1. 1907 World Series (October 8, 1907), Cubs vs Tigers 4–0: 20 years, 241 days
2. 1910 World Series (October 17, 1910), Cubs vs Athletics 1–4: 23 years, 250 days
3. 1917 World Series (October 6, 1917), Giants vs White Sox 2–4: 30 years, 239 days

Age in each season

1. 1907 (Cubs): 20 years, 51 days to 20 years, 234 days
2. 1908 (Cubs): 21 years, 52 days to 21 years, 235 days
3. 1909 (Cubs): 22 years, 51 days to 22 years, 234 days
4. 1910 (Cubs): 23 years, 51 days to 23 years, 234 days
5. 1911 (Cubs): 24 years, 51 days to 24 years, 234 days
6. 1912 (Cubs): 25 years, 52 days to 25 years, 235 days
7. 1913 (Cubs): 26 years, 51 days to 26 years, 234 days
8. 1914 (Cubs): 27 years, 51 days to 27 years, 234 days
9. 1915 (Cubs): 28 years, 51 days to 28 years, 234 days
10. 1916 (Cubs, Giants): 29 years, 52 days to 29 years, 235 days
11. 1917 (Giants): 30 years, 51 days to 30 years, 234 days
12. 1918 (Giants): 31 years, 51 days to 31 years, 234 days
13. 1919 (Giants): 32 years, 51 days to 32 years, 234 days