Federer with 13
Pete Sampras has the most Grand Slams with 14.
Through the 2013 season, there were 6452 grand slams hit in baseball history. The most grand slams in a season happened in the year 2000 when 176 grand slams were hit.
Lou Gehrig with 23 grand slams
As of 04AUG09, Albert Pujols has 11 career grand slams. That is the most by any St. Louis Cardinal in history. So far, he has 5 grand slams in the 2009 season.
Lou Gehrig with 23
Currently, The Yankees Alex Rodriguez and the Royals Yuniesky Betancourt are the major league leaders with three grand slams each in 2010.
19 by Eddie Murray. Murray had 19 grand slams in 21 seasons (1977-1997). He hit 16 grand slams for the Baltimore Orioles, 1 for the Los Angeles Dodgers, and 2 for the New York Mets. He is 3rd in MLB career grand slams behind Manny Ramirez (20) and Lou Gehrig (23).