On this day in 1925, Lou Gehrig hit his 1st career grand slam in an 11-7 win against the Washington Senators at #YankeeStadium. Gehrig would go on to hit 22 more grand slams as a member of the #Yankees... establishing a record that would last for 75 years until 2013, when current Yankees slugger Alex Rodriguez woud club his 24th career grand slam. #BronxBombers #ThisDayInYankeesHistory