The single-season record-holder for most home runs in a year is Barry Bonds. He hit 73 home runs in 2001.
The most home runs Hank Aaron hit in one season was 47, in 1971.
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 both 1965 and 1969, Rose hit 16 home runs -- the most for one year of his MLB career.
He hit 52 home runs during the 1965 season, his second MVP year.
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.
Barry Bonds hit 73 home runs in 2001.
The most amount of home runs hit in a single inning is five.