On July 4, 1939, Boston Red Sox third baseman Jim Tabor four home runs in a doubleheader as Boston sweeps Philadelphia, 17 – 7 and 18 – 12. Three of his homers, including a record-tying two grand slams, come in the nightcap. He totals 19 bases and 11 RBI in the two slugfests.
Baltimore Orioles slugger Jim Gentile becomes the first major leaguer to hit grand slams in consecutive innings
May 9, 1961
June 1, 1955
Gil Hodges of the Brooklyn Dodgers sets a new National League record with his 13th career grand slam
August 1, 1957
May 13, 1942