Perhaps the most famous home run Galarraga hit was a mammoth grand slam off Kevin Brown on May 31, 1997, which landed 20 rows deep into the upper deck at Florida Marlins' Pro Player Stadium. It may also be his most debated home run with a distance initially measured at and then . At the time, it set a record for both the Rockies and the stadium. In 2011, ESPN's Home Run Tracker recalculated the distance to . Previously, Galarraga smashed two homers in two games that traveled and respectively, totaling , an average of each.