14, by the Oakland Athletics in 2000 and the Cleveland Indians in 2006.
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The New York Yankees hit 3 grand slams in a 22-9 win over the Oakland A's on Thursday, August 25th, 2011.
who holds the mariners career record for grand slams how many
Through the 2008 season, 6 by Don Mattingly of the Yankees in 1987 and Travis Hafner of the Indians in 2006.
The 1996 Detroit Tigers gave up 14 Grand Slams for the Major League record. The NL record is 12 by the team formerly known as the Montreal Expos in 2000.chris dixonsilverdale, WA
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.
As of the start of the 2008 season, that would be Ernie Banks with 12.