Five times.
1 2005 Boston Red Sox AL
2 David Ortiz / Manny Ramirez
2 2001 Texas Rangers AL
2 Rafael Palmeiro / Alex Rodriguez
3 1961 New York Yankees AL 2 Mickey Mantle / Roger Maris
4 1931 New York Yankees AL 2 Lou Gehrig / Babe Ruth
5 1927 New York Yankees AL 2 Lou Gehrig / Babe Ruth