Mort Cooper
P · Born March 2, 1913
Age in each postseason series
- 1942 World Series (September 30, 1942), Cardinals vs Yankees 4–1: 29 years, 212 days
- 1943 World Series (October 5, 1943), Cardinals vs Yankees 1–4: 30 years, 217 days
- 1944 World Series (October 4, 1944), Cardinals vs Browns 4–2: 31 years, 216 days
Age in each season
- 1938 (Cardinals): 25 years, 30 days to 25 years, 213 days
- 1939 (Cardinals): 26 years, 30 days to 26 years, 213 days
- 1940 (Cardinals): 27 years, 30 days to 27 years, 213 days
- 1941 (Cardinals): 28 years, 30 days to 28 years, 213 days
- 1942 (Cardinals): 29 years, 30 days to 29 years, 213 days
- 1943 (Cardinals): 30 years, 30 days to 30 years, 213 days
- 1944 (Cardinals): 31 years, 30 days to 31 years, 213 days
- 1945 (Braves, Cardinals): 32 years, 30 days to 32 years, 213 days
- 1946 (Braves): 33 years, 30 days to 33 years, 213 days
- 1947 (Braves, Giants): 34 years, 30 days to 34 years, 213 days
- 1949 (Cubs): 36 years, 30 days to 36 years, 213 days