How old were they?

Jack Barry

SS · Born April 26, 1887

Age in each postseason series

1. 1910 World Series (October 17, 1910), Athletics vs Cubs 4–1: 23 years, 174 days
2. 1911 World Series (October 14, 1911), Athletics vs Giants 4–2: 24 years, 171 days
3. 1913 World Series (October 7, 1913), Athletics vs Giants 4–1: 26 years, 164 days
4. 1914 World Series (October 9, 1914), Athletics vs Braves 0–4: 27 years, 166 days
5. 1915 World Series (October 8, 1915), Red Sox vs Phillies 4–1: 28 years, 165 days

Age in each season

1. 1908 (Athletics): 20 years, 341 days to 21 years, 158 days
2. 1909 (Athletics): 21 years, 340 days to 22 years, 158 days
3. 1910 (Athletics): 22 years, 340 days to 23 years, 158 days
4. 1911 (Athletics): 23 years, 340 days to 24 years, 158 days
5. 1912 (Athletics): 24 years, 341 days to 25 years, 158 days
6. 1913 (Athletics): 25 years, 340 days to 26 years, 158 days
7. 1914 (Athletics): 26 years, 340 days to 27 years, 158 days
8. 1915 (Red Sox, Athletics): 27 years, 340 days to 28 years, 158 days
9. 1916 (Red Sox): 28 years, 341 days to 29 years, 158 days
10. 1917 (Red Sox): 29 years, 340 days to 30 years, 158 days
11. 1919 (Red Sox): 31 years, 340 days to 32 years, 158 days