If you are talking about in a career, Barry Bonds hit 762 in his career. For a season, it is also Barry Bonds, who hit 73 homeruns in 2001. MLB record for most HR in a game: The record is 4, held by multiple players: Colavito (1959), Cameron (2002), Delgado (2003), Gherig (1932), Adcock (1954), Delahanty (1896), Green (2002), Hodges (1950), Horner (1986), Lowe (1894), Mays (1961), Whiten (1993). In NCAA Baseball, the record for HR in a season: Pete Incaviglia from Oklahoma State. He hit 48 in 75 games in 1985. The NCAA HR in a career record: Incaviglia, who hit 100 HR between 1983-85 (213 games). The record for most HR's in a single NCAA baseball game: Marshall McDougall (Florida State, 1999)- 6 HR's vs. Maryland
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