How old were they?

Tillie Shafer

3B · Born March 22, 1889

Age in each postseason series

1. 1912 World Series (October 8, 1912), Giants vs Red Sox 3–4: 23 years, 200 days
2. 1913 World Series (October 7, 1913), Giants vs Athletics 1–4: 24 years, 199 days

Age in each season

1. 1909 (Giants): 20 years, 10 days to 20 years, 193 days
2. 1910 (Giants): 21 years, 10 days to 21 years, 193 days
3. 1912 (Giants): 23 years, 10 days to 23 years, 193 days
4. 1913 (Giants): 24 years, 10 days to 24 years, 193 days