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. Hank Greenberg and Rudy York homer for the Bengals, while Wally Moses has a pair of triples and two singles.
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.