Barry Bond
Barry Bonds holds the major league records for career home runs (762) and for a single season (73 in 2001).
bonds 73 home runs
Barry Bonds
Barry Bond
Barry Bonds
Barry Bonds* Holds both records. He broke Hank Aaron's record of homers in 2007 and has 762 and broke McGwire's single-season record in 2001 and has 73. But note the asterisk.
Coors field
Mike Smith
He holds the world record for the most home runs in a single season.
Mike Smith
California Angels.
Barry Bonds is the current holder, with 73 home runs in 2001.