In MLB through the 2008 season, the record for home runs by a team in one season is 264 by the 1997 Seattle Mariners.
The record for team home runs in a season is held by the 1997 Seattle Mariners who hit 264.
In 1997, the Seattle Mariners hit 264 home runs to set the MLB record.
The 1997 Seattle Mariners hold the MLB single season record for home runs with 264.
The 1997 Seattle Mariners.
As of the 2008 season, that is 200 home runs that the Mets hit in the 2006 season. Carlos Beltran led the team that year with 41, Carlos Delgado hit 38.
New York Yankees 1961
If you mean by an individual player, the answer is Barry Bonds: 73 home runs in 2001. The American League record is still owned by Roger Maris, who hit 61 home runs in 1961. If you mean by a team, that record was set by the Seattle Mariners in 1997 with 264 home runs. If you mean the highest single-season major league total, the most home runs hit in the major leagues in a single season occurred in 2000, with 5,693.
That was the 1906 Chicago White Sox who hit 7 home runs for the season.