Keith Hernandez
1B · Born October 20, 1953
Age in each postseason series
- 1982 NLCS (October 7, 1982), Cardinals vs Braves 3–0: 28 years, 352 days
- 1982 World Series (October 12, 1982), Cardinals vs Brewers 4–3: 28 years, 357 days
- 1986 NLCS (October 8, 1986), Mets vs Astros 4–2: 32 years, 353 days
- 1986 World Series (October 18, 1986), Mets vs Red Sox 4–3: 32 years, 363 days
- 1988 NLCS (October 4, 1988), Mets vs Dodgers 3–4: 34 years, 350 days
Age in each season
- 1974 (Cardinals): 20 years, 163 days to 20 years, 346 days
- 1975 (Cardinals): 21 years, 163 days to 21 years, 346 days
- 1976 (Cardinals): 22 years, 164 days to 22 years, 347 days
- 1977 (Cardinals): 23 years, 163 days to 23 years, 346 days
- 1978 (Cardinals): 24 years, 163 days to 24 years, 346 days
- 1979 (Cardinals): 25 years, 163 days to 25 years, 346 days
- 1980 (Cardinals): 26 years, 164 days to 26 years, 347 days
- 1981 (Cardinals): 27 years, 163 days to 27 years, 346 days
- 1982 (Cardinals): 28 years, 163 days to 28 years, 346 days
- 1983 (Mets, Cardinals): 29 years, 163 days to 29 years, 346 days
- 1984 (Mets): 30 years, 164 days to 30 years, 347 days
- 1985 (Mets): 31 years, 163 days to 31 years, 346 days
- 1986 (Mets): 32 years, 163 days to 32 years, 346 days
- 1987 (Mets): 33 years, 163 days to 33 years, 346 days
- 1988 (Mets): 34 years, 164 days to 34 years, 347 days
- 1989 (Mets): 35 years, 163 days to 35 years, 346 days
- 1990 (Indians): 36 years, 163 days to 36 years, 346 days