Atlanta Braves' Tony Cloninger Hits Two Grand Slams

On July 3, 1966, in the Atlanta Braves 17-3 rout of the San Francisco Giants, Tony Cloninger hits two grand slams and collects nine RBI's at Candlestick Park. 

The Braves' pitcher is the first National league player to hit two home runs with the bases full in the same game.

Only 12 other players have hit two grand slams in one game, with four players doing it before Cloninger. 

Tony Lazzeri did it for the New York Yankees in 1936. Jim Tabor did it for the Boston Red Sox on July 4, 1939. Rudy York also did it for the Boston Red Sox, in 1946, and Jim Gentile did it for the Baltimore Orioles in 1961.

The following players completed the feat after Cloninger. In 1968 Jim Northup did it for the Detroit Tigers. Frank Robinson did it for the Baltimore Orioles in 1970. In 1995 Robin Ventura did it while a member of the Chicago White Sox. Later Ventura became the only player to hit a grand slam in each game of a doubleheader, while playing for the New York Mets in 1999.

Chris Hoiles did it as a member of the Baltimore Orioles in 1998. 
 
In 1999 Fernando Tatis hit two grand slams in one inning as a member of the St. Louis Cardinals. Tatis was also the first National League player to complete the feat since Cloninger. Tatis also holds the record for most RBIs in a single inning.

Also in 1999, Nomar Garciaparra did it as a member of the Boston Red Sox. Garciaparra was the only player on the list to hit two grand slams in one game, to be playing on the home team. He also hit another home run that day finishing the day with 10 RBIs.

Former Giants third baseman Bill Mueller did it in 2003 with the Boston Red Sox and in 2009 Josh Willingham did it as a member of the Washington Nationals.