On May 21, 1940, at Briggs Stadium in Detroit, future Hall of Famer Jimmie Foxx of the Boston Red Sox hits a grand slam home run for the second consecutive day. Foxx’s grand slam proves decisive, as the Red Sox defeat the Detroit Tigers, 11-8. Ted Williams, Bobby Doerr and Doc Cramer also homer for Boston.
On May 20, Foxx hit his grand slam off Tommy Bridges in a 10-7 Boston Loss to Detroit, and on May 21 he hit his 11th home run of the young season and grand slam off Dizzy Trout.
Only Babe Ruth, twice, and Bill Dickey have slammed on consecutive days in the American League.