page_title: List of Major League Baseball annual home run leaders
section_title: American League
hierarchical_section_title: List of Major League Baseball annual home run leaders / American League
caption_attribution_description: English: Ken Griffey in June 2009.
context_page_description: In baseball, a home run is scored when the ball is hit so far that the batter is able to circle all the bases ending at home plate, scoring himself plus any runners already on base, with no errors by the defensive team on the play. An automatic home run is achieved by hitting the ball on the fly over the outfield fence in fair territory. More rarely, an inside-the-park home run occurs when the hitter reaches home plate while the baseball remains in play on the field. In Major League Baseball, a player in each league wins the home run title each season by hitting the most home runs that year. Only home runs hit in a particular league count towards that league's seasonal lead. Mark McGwire, for example, hit 58 home runs in 1997, more than any other player that year. However, McGwire was traded from the American League's Oakland Athletics to the National League's St. Louis Cardinals midway through the season and his individual AL and NL home run totals did not qualify to lead either league.
  The first home run champion in the National League was George Hall. In the league's inaugural 1876 season, Hall hit five home runs for the short-lived National League Philadelphia Athletics.
caption: Ken Griffey, Jr. led the American League in home runs in four seasons during the 1990s, including three consecutively from 1997 to 1999.
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