Don Mattingly sets a major league record by hitting his sixth grand slam of the season, surpassing the mark shared by Ernie Banks (1955 Cubs) and Jim Gentile (1961 Orioles). Remarkably, the Yankees first baseman will not hit any other round-trippers with the bases loaded during his entire 14-year career.

On September 29, 1987 — Don Mattingly sets a major league record by hitting his sixth grand slam of the season, surpassing the mark shared by Ernie Banks (1955 Cubs) and Jim Gentile (1961 Orioles). Remarkably, the Yankees first baseman will not hit any other round-trippers with the bases loaded during his entire 14-year career. Mattingly’s home run helps the Yankees to a 6-0 win over the Boston Red Sox…

 


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Sources:
Baseball Reference September 29
National Pastime September 29
Retro Sheet
Hall of Fame
SABR Games Project
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