Harry Steinfeldt
3B · Born September 29, 1875
Age in each postseason series
- 1906 World Series (October 9, 1906), Cubs vs White Sox 2–4: 31 years, 10 days
- 1907 World Series (October 8, 1907), Cubs vs Tigers 4–0: 32 years, 9 days
- 1908 World Series (October 10, 1908), Cubs vs Tigers 4–1: 33 years, 11 days
- 1910 World Series (October 17, 1910), Cubs vs Athletics 1–4: 35 years, 18 days
Age in each season
- 1898 (Reds): 22 years, 184 days to 23 years, 2 days
- 1899 (Reds): 23 years, 184 days to 24 years, 2 days
- 1900 (Reds): 24 years, 184 days to 25 years, 2 days
- 1901 (Reds): 25 years, 184 days to 26 years, 2 days
- 1902 (Reds): 26 years, 184 days to 27 years, 2 days
- 1903 (Reds): 27 years, 184 days to 28 years, 2 days
- 1904 (Reds): 28 years, 185 days to 29 years, 2 days
- 1905 (Reds): 29 years, 184 days to 30 years, 2 days
- 1906 (Cubs): 30 years, 184 days to 31 years, 2 days
- 1907 (Cubs): 31 years, 184 days to 32 years, 2 days
- 1908 (Cubs): 32 years, 185 days to 33 years, 2 days
- 1909 (Cubs): 33 years, 184 days to 34 years, 2 days
- 1910 (Cubs): 34 years, 184 days to 35 years, 2 days
- 1911 (Rustlers): 35 years, 184 days to 36 years, 2 days