Thirteen players have smashed a pair of slams in one game.
Josh Willingham Washington Nationals
Josh Willingham of the Nationals belted grand slams in the fifth and sixth innings on July 27, 2009.
Morry Gash/AP
Bill Mueller Boston Red Sox
Bill Mueller of the Red Sox hit slams in the seventh and eighth innings on July 29, 2003.
Linda Kaye/AP
Nomar Garciaparra Boston Red Sox
Red Sox shortstop Nomar Garciaparra belted grand slams in the first and eighth innings on May 10, 1999.
Elise Amendola/AP
Fernando Tatis St. Louis Cardinals
Fernando Tatis of the Cardinals launched both of his grand slams in the third inning on April 23, 1999.
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Chris Hoiles Baltimore Orioles
Orioles catcher Chris Hoiles' slams came in the third and eighth innings on Aug. 14, 1998
John Klein/MLB Photos
Robin Ventura Chicago White Sox
Robin Ventura of the White Sox roped grand slams in the fourth and fifth innings on Sept. 4, 1995.
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Frank Robinson Baltimore Orioles
Orioles Hall of Famer Frank Robinson crushed grand slams in the fifth and sixth innings on June 26, 1970.
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Jim Northrup Detroit Tigers
Tigers right fielder Jim Northrup hit slams in the fifth and sixth innings on June 24, 1968.
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Tony Cloninger Atlanta Braves
Braves pitcher Tony Cloninger was the first hurler to belt grand slams, doing so in the first and fourth innings on July 3, 1966.
Robert "Sammy" Houston/AP
Jim Gentile Baltimore Orioles
Jim Gentile of the Orioles hit slams in the first and second innings on May 9, 1961.
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Rudy York Boston Red Sox
Red Sox first baseman Rudy York's slams were hit in the second and fifth innings on July 27, 1946.
AP
Jim Tabor Boston Red Sox
Jim Tabor (center) of the Boston Red Sox celebrated the Fourth of July in 1939 with grand slams in the third and sixth innings.
Paul J. Maguire/The Boston Globe/Getty Images
Tony Lazzeri New York Yankees
Tony Lazzeri of the Yankees became the first player to hit two grand slams in the same game when he went deep in the second and fifth innings on May 24, 1936.