The single-season record-holder for most home runs in a year is Barry Bonds. He hit 73 home runs in 2001.
Dave Klingman holds the record for most home runs hit during a retirement season. He hit 35 home runs in his 1987 final season.
In the 2007 season, Rodriguez hit 54 home runs in the regular season and 1 home run in the postseason.
He hit 52 home runs during the 1965 season, his second MVP year.
He hit no Home Runs in his first year which was 1914
he hit 15 home runs in his rookie season.
As of August 26 in the 2007 season, Lance Berkman has hit 24 home runs. Berkman wound up the 2007 season with 34 home runs.
Barry Bonds hit 33 home runs for the 1995 season, and finished the year with 292 career home runs.
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.
Mark Mcgwire hit 70 home runs in 1998, the year he broke Roger Maris' single season home run record of 61.
Brooks Robinson hit 268 home runs in his 23 season career (1955-1977). The most home runs he hit in a season was 28 in 1964, the year he was named American League MVP.
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.
Albert Pujols hit 47 home runs during the 2009 season.
Barry Bonds of the San Francisco Giants hit 73 home runs during the 2001 season.
Players with 300+ career home runs with "never more than 30" in a year: 1) Ruben Sierra - 306 career home runs with a season max of 30 in 1987. 2) Ron Cey - 316 career home runs with a season max of 30 in 1977. 3) George Brett - 317 career home runs with a season max of 30 in 1985. 4) Chili Davis - 350 career home runs with a season max of 30 in 1997. 5) Yogi Berra - 358 career home runs with a season max of 30 in 1952 and 1956. 6) Harold Baines - 384 career home runs with a season max of 29 in 1984. 7) Al Kaline - 399 career home runs with a season max of 29 in 1962 and 1966.
The most home runs Hank Aaron hit in one season was 47, in 1971.
Barry Bonds of the San Francisco Giants hit a record 73 home runs during the 2001 season.
Alex Rodriguez has averaged 44 home runs per 162 game season in his career..
In both 1965 and 1969, Rose hit 16 home runs -- the most for one year of his MLB career.
Averaging about 44 home runs a year throughout his career Alex Rodriguez with 583 home runs as of 2009, is on pace to hit his 700th home run some time in the 2012 season.
In the Rockies first season (1993) they hit 142 home runs ... Charlie Hayes led the team with 25.
The Chicago Cubs hit 151 hame runs during the 2007 season.
Barry Bonds is the all-time career leader in walks (2,558) and intentional walks (688), so it shouldn't be surprising that he led the majors in home runs and walks during his historic 2001 season. That year, Bonds set new major-league records for home runs in a season with 73 and walks with 177.
Barry Bonds holds the record for most postseason home runs in a single season with 8, set in 2002.
Alex Rodriguez hit 48 home runs in 2005, his second season with the Yankees.