Mattingly's fourth grand slam
Yankees @ RangersJuly 16, 1987 | 00:00:59
7/16/87: Don Mattingly hits his fourth grand slam of the season, tying Lou Gehrig for most by a Yankee and one shy the Major League mark
7/16/87: Don Mattingly hits his fourth grand slam of the season, tying Lou Gehrig for most by a Yankee and one shy the Major League mark