Harrison Bader took a page out of Stone Cold Steve Austin's playbook on Tuesday night -- chugging three beers at once to celebrate the Yankees winning the AL East title ... and it was EPIC!!!
The New York outfielder -- who's only been a member of the Pinstripes for a few weeks after being acquired by the team in a trade with the Cardinals last month -- was seen hitting the party trick in the locker room following NY's 5-2 win over the Toronto Blue Jays.