Batters with two grand slams in the same baseball game
Listed below are the Major League Baseball players who have hit 2 grand slams in the same game.
| Date | Player | Team |
| May 24, 1936 | Tony Lazzeri | New York Yankees, AL |
| July 4, 1939 | Jim Tabor | Boston Red Sox, AL |
| July 27, 1946 | Rudy York | Boston Red Sox, AL |
| May 9, 1961 | Jim Gentile | Baltimore Orioles, AL |
| July 3, 1966 | Tony Cloninger | Atlanta Braves, NL |
| June 24, 1968 | Jim Northrup | Detroit Tigers, AL |
| June 26, 1970 | Frank Robinson | Baltimore Orioles, AL |
| September 4, 1995 | Robin Ventura | Chicago White Sox, AL |
| August 14, 1998 | Chris Hoiles | Baltimore Orioles, AL |
| April 23, 1999 | Fernando Tatis | St. Louis Cardinals, NL |
| May 10, 1999 | Nomar Garciaparra | Boston Red Sox, AL |
| July 29, 2003 | Bill Mueller | Boston Red Sox, AL |
Notes
- Tony Cloninger is the only pitcher on the list.
- Fernando Tatis is the only player to hit his grand slams during the same inning.
- Tony Lazzeri, Jim Tabor and Jim Gentile belted their slams in consecutive innings.
- Bill Mueller is the only player to hit his slams from opposite sides of the plate.
- Jim Northrup hit his slams in consecutive at-bats.
- Robin Ventura is the only player to hit grand slams in each game of a double header.
