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This Day in Yankees History: Don Mattingly hits sixth grand slam of the ‘87 season

October baseball is almost here! As the 2020 postseason gets underway, the Pinstripe Alley team will continue highlighting special moments and milestones in Yankees history through our daily posts. Let’s take a trip down memory lane.

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This Day in Yankees History (September 29)

33 Years Ago

Yankee captain Don Mattingly sets a major league record when he hits his sixth grand slam of the season off Red Sox pitcher Bruce Hurst. The home run—Mattingly’s 29th of the season—gives the Yankees a 4-0 lead over the Sox in the third inning.