Barry Bond hit 73 home runs in 2001 to set the single season home run record.
Barry Bonds holds the record for career home runs with 762 and the mark for most homers in a season with 73.
Mark McGwire had over 70 home runs in one season
Dave Klingman holds the record for most home runs hit during a retirement season. He hit 35 home runs in his 1987 final season.
Barry Bonds holds the records for most home runs in a season (73) and for a career (762).
The record for team home runs in a season is held by the 1997 Seattle Mariners who hit 264.
Barry Bonds of the San Francisco Giants hit a record 73 home runs during the 2001 season. He also holds the record for career home runs with 762.
He holds the major league records for most home runs in a career (762) and most home runs in a season (73).
The single-season record-holder for most home runs in a year is Barry Bonds. He hit 73 home runs in 2001.
Through the 2008 season, that is Prince Fielder with 50 home runs in 2007.
The most home runs Hank Aaron hit in an MLB season was 47 in 1971.
Prince Fielder (50)
The most home runs by a rookie in a season was 49. They were hit by Mark McGwire in 1987. He later broke Babe Ruth's record for a season.
He holds the world record for the most home runs in a single season.
Barry Bonds with 73 in one season
Barry Bonds has the most homeruns in a single season. His record is 73.
Barry Bonds holds the record for most postseason home runs in a single season with 8, set in 2002.
Bonds holds the records for most career home runs (762) and home runs in a season (73 in 2001). He surpassed Hank Aaron's record of 755 home runs in 2007. He broke Mark McGwire's single-season home run record of 70 in '01.
Mickey Mantle of the Yankees with 536 career home runs. Mantle also holds the record for most home runs by a switch hitter in a season with 54.
As of June 2014 Barry Bonds holds the record for most regular season homeruns. The record is 73 which beat Mark McGwire's record.
In 1997, the Seattle Mariners hit 264 home runs to set the MLB record.
The most home runs he ever hit in one season was the record 73 he compiled in 2001.
David Ortiz set the single-season record for most home runs by a Boston Red Sox player in 2006. He hit 54 home runs that year, which was the most in the American League.
In MLB through the 2008 season, the record for home runs by a team in one season is 264 by the 1997 Seattle Mariners.