The Giants and the Dodgers were bitter rivals engaged in a pennant race on Aug. 22, 1965, when Juan Marichal came up to bat against Sandy Koufax. When Dodgers catcher Johnny Roseboro threw a ball back to Koufax that nicked Marichal’s ear, the San Francisco ace struck the catcher with his bat, setting off a melee and opening a two-inch gash on Roseboro’s head. Marichal was suspended nine days and fined $1,750. (Neil Leifer/SI)

GALLERY: Notorious Basebrawls