On July 15, 1969, Cincinnati Reds slugger Lee May hits four home runs in a doubleheader against the Atlanta Braves. May hits two home runs and drives in five runs in each of the two games. The Reds lose the opener, 9-8, before winning the nightcap, 10-4.
Larry Parrish of the Texas Rangers ties a major league record by clubbing his third grand slam within the span of a week
July 10, 1982