Dom DiMaggio was born on Monday, February 12, 1917, in San Francisco, California. DiMaggio was 23 years old when he broke into the big leagues on April 16, 1940, with the Boston Red Sox.
Joe Garagiola was born on Friday, February 12, 1926, in St. Louis, Missouri. Garagiola was 20 years old when he broke into the big leagues on May 26, 1946, with the St. Louis Cardinals.
Courtesy Baseball Almanac