How old were they?

Harry McCormick

LF · Born February 28, 1881

Age in each postseason series

1. 1912 World Series (October 8, 1912), Giants vs Red Sox 3–4: 31 years, 223 days
2. 1913 World Series (October 7, 1913), Giants vs Athletics 1–4: 32 years, 221 days

Age in each season

1. 1904 (Pirates, Giants): 23 years, 33 days to 23 years, 216 days
2. 1908 (Giants, Phillies): 27 years, 33 days to 27 years, 216 days
3. 1909 (Giants): 28 years, 32 days to 28 years, 215 days
4. 1912 (Giants): 31 years, 33 days to 31 years, 216 days
5. 1913 (Giants): 32 years, 32 days to 32 years, 215 days