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In MLB, that was the Texas Rangers with 230. The New York Yankees were second with 223.
In 2009, the Philadelphia Phillies and the Texas Rangers were tied for second place with 224 home runs. The Yankees led the league with 244.
If you are talking two separate seasons then it is A-Rod.
The Texas Rangers hit 162 home runs in 2010.
In 2012, the Yankees hit 245 home runs. They were the Major League leaders in home runs for the season.
The Yankees hit 205 home runs in 2000.
In 2000, the Yankees hit 205 home runs.
In 2005, the Yankees hit 229 home runs.
In 2012, the Yankees allowed 190 home runs.
In 2011, the Yankees hit 222 home runs.
In 2012, the Yankees hit 138 home runs at home and 107 on the road.
Barry Bonds has hit the most home runs at Rangers Ballpark in Arlington