Alex Rodriguez has tied Manny Ramirez for second place on the career list with his 21st grand slam.
Rodriguez connected in the third inning against Oakland All-Star Trevor Cahill on Tuesday night. It was Rodriguez's third slam of the season. He needs two more to tie Hall of Famer Lou Gehrig for the most ever.
The slam was the major league-leading ninth of the season for the Yankees. That's one shy of the franchise record set in 1987.
Rodriguez added a solo homer in the sixth inning for his 55th career multihomer game. He has 597 home runs.