On June 11, 1957 The Dodgers’ Roy Campanella surpasses former Cub and Giant backstop Gabby Hartnett to establish a new National League mark when he hits his 237th career round-tripper as a catcher. Campy’s historic home run comes off Ray Crone in the seventh inning of Brooklyn’s 7-2 loss to the Braves at Ebbets Field.