As of the 2008 season, the record is 9 and is held by pitcher Tony Cloninger who hit 2 grand slams in a game against the San Francisco Giants on July 3, 1966.
In a 7 game World Series that was Bobby Richardson of the 1960 New York Yankees with 12. The Yankees lost that WS to the Pittsburgh Pirates 4 games to 3.
Phillies
Through the 2011 season, Albert Pujols of the St. Louis Cardinals has 1,329 career RBIs.
Nine by Tony Cloninger of the Atlanta Braves on July 3, 1966 against the San Francisco Giants. Cloninger hit two grand slams and a single to account for the 9 RBIs.
In MLB, that was 4 against the Philadelphia Athletics on June 3, 1932.
8
In MLB, the most HRs Dwight hit in a game was 2 ... he did this 22 times.
In a 7 game World Series that was Bobby Richardson of the 1960 New York Yankees with 12. The Yankees lost that WS to the Pittsburgh Pirates 4 games to 3.
Phillies
Through the 2011 season, Albert Pujols of the St. Louis Cardinals has 1,329 career RBIs.
Nine by Tony Cloninger of the Atlanta Braves on July 3, 1966 against the San Francisco Giants. Cloninger hit two grand slams and a single to account for the 9 RBIs.
Vladimir Guerrero Guerrero had 9 RBIs against the Boston Red Sox on June 2, 2004. He went 4 for 4 with 2 HRs, a double, and a single.
As many as the players can hit. There is no limit.
Shane Victonino
In MLB, that was 4 against the Philadelphia Athletics on June 3, 1932.
In 2006 New York Mets Carlos Beltran had 116 RBIs, David Wright had 116 RBIS, and Carlos Delgado had 114 RBIs.
No, he hit a walk off home run in his first major league game but it was not his first at-bat.