On July 21, 1973, Hank Aaron of the Atlanta Braves hits his 700th career home run. The 39-year-old star connects against Ken Brett of the Philadelphia Phillies, but the Braves lose the game, 8-4.
Richie Allen of the Philadelphia Phillies hits the first regular season home run in the history of the Astrodome
April 12, 1965
April 29, 1953
Frank Robinson of the Baltimore Orioles becomes the first player to hit a home run completely out of Memorial Stadium.
May 8, 1966