I am not sure which stadium produced the most and have been unsuccessful in finding the answer online, but I do know Yankee Stadium was leading the pace most of the season and completed the 2009 regular season with 237.
The new Yankee stadium
in 2009 New Yankee stadium
Wrigley Field (1961 home of the AL Los Angeles Angels) 248
The most likely site is Citi Field, the new home of the New York Mets since the 2009 season. The Mets haven't hosted an All-Star Game since 1964, their first season in Shea Stadium.
citi field 288
San Fransisco '49ers
Probably the old Yankee Stadium,the stadium the Mets play in,or the San Fran Stadium because they had big sluggers.
Albert Pujols lead Major League Baseball with 47 Home Runs in 2009
i believe the record is 303 in 1999 at coors field
Through the 2009 season, that is Luis Gonzalez who hit 57 home runs in 2001.
New York Yankess have hit the most home runs, with 226 for the season to 20 September.
Roger Maris in 61 I believe.
The Boston Red Sox Had 212 Home Runs in the season of 2009, and Jason Bay with the most home runs (36)
I would say Yankee Stadium (2009)
172 ... 9th most in the American League.
Ray Lankford hit 123 home runs at Busch Memorial Stadium, the most of any MLB player. Busch Memorial Stadium was home to the St. Louis Cardinals from 1966 to 2005.
Through the 2009 season, Ken Griffey Jr. with 630.