About Granny Hamner
Granville Wilbur "Granny" Hamner was an American professional baseball shortstop and second baseman in Major League Baseball (MLB). Hamner was one of the key players on the "Whiz Kids", the 1950 National League (NL) champion Philadelphia Phillies. In 1945, still seventeen, he became the youngest player ever to start an Opening Day game, a record that still stands as of 2022. Hamner then became a Kansas City Athletics’ Minor League Baseball (MiLB), manager, reappearing briefly with the A's as a pitcher during the 1962 season. (He had begun dabbling on the mound for the 1956-57 Phillies).
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.