Buck O'Brien
P · Born May 9, 1882
Age in each postseason series
- 1912 World Series (October 8, 1912), Red Sox vs Giants 4–3: 30 years, 152 days
Age in each season
- 1911 (Red Sox): 28 years, 327 days to 29 years, 145 days
- 1912 (Red Sox): 29 years, 328 days to 30 years, 145 days
- 1913 (Red Sox, White Sox): 30 years, 327 days to 31 years, 145 days