A list of players with the most grand slams in a single season:

6 - Travis Hafner, Cleveland, 2006.

6 - Don Mattingly, New York (AL), 1987.

5 - Jim Gentile, Baltimore, 1961.

5 - Ernie Banks, Chicago (NL), 1955.

4 - Albert Pujols, St. Louis, 2009.

4 - Babe Ruth, Boston (AL), 1919.

4 - Lou Gehrig, New York (AL), 1934

4 - Rudy York, Detroit, 1938.

4 - Tommy Henrich, New York (AL), 1948.

4 - Sid Gordon, Boston (NL), 1950.

4 - Al Rosen, Cleveland, 1951.

4 - Ray Boone, Detroit, 1953.

4 - Jim Northrup, Detroit, 1968.

4 - Richie Sexson, Seattle, 2006.