page_title: Home run
section_title: History
hierarchical_section_title: Home run / History
caption_attribution_description: English: Polo Grounds bleachers during Game 3 of the 1917 World Series (Giants vs. White Sox), October 10, 1917.
context_page_description: In baseball, a home run is scored when the ball is hit in such a way that the batter is able to circle the bases and reach home
  safely in one play without any errors being committed by the defensive team in the process. In modern baseball, the feat is typically achieved by hitting the ball over the outfield fence between the foul poles without first touching the ground, resulting in an automatic home run. There is also the "inside-the-park" home run where the batter reaches home safely while the baseball is in play on the field.
  When a home run is scored, the batter is also credited with a hit and a run scored, and an RBI for each runner that scores, including himself. Likewise, the pitcher is recorded as having given up a hit and a run, with additional runs charged for each runner that scores other than the batter.
  Home runs are among the most popular aspects of baseball and, as a result, prolific home run hitters are usually the most popular among fans and consequently the highest paid by teams—hence the old saying, "Home run hitters drive Cadillacs, and singles hitters drive Fords".
context_section_description: In the early days of the game, when the ball was less lively and the ballparks generally had very large outfields, most home runs were of the inside-the-park variety. The first home run ever hit in the National League was by Ross Barnes of the Chicago White Stockings (now known as the Chicago Cubs), in 1876. The home "run" was literally descriptive. Home runs over the fence were rare, and only in ballparks where a fence was fairly close. Hitters were discouraged from trying to hit home runs, with the conventional wisdom being that if they tried to do so they would simply fly out. This was a serious concern in the 19th century, because in baseball's early days a ball caught after one bounce was still an out. The emphasis was on place-hitting and what is now called "manufacturing runs" or "small ball".
  The home run's place in baseball changed dramatically when the live-ball era began after World War I. First, the materials and manufacturing processes improved significantly, making the now-mass-produced, cork-centered ball somewhat more lively. Batters such as Babe Ruth and Rogers Hornsby took full advantage of rules changes that were instituted during the 1920s, particularly prohibition of the spitball, and the requirement that balls be replaced when worn or dirty. These changes resulted in the baseball being easier to see and hit, and easier to hit out of the park. Meanwhile, as the game's popularity boomed, more outfield seating was built, shrinking the size of the outfield and increasing the chances of a long fly ball resulting in a home run. The teams with the sluggers, typified by the New York Yankees, became the championship teams, and other teams had to change their focus from the "inside game" to the "power game" in order to keep up.
  Before 1931, Major League Baseball considered a fair ball that bounced over an outfield fence to be a home run. The rule was changed to require the ball to clear the fence on the fly, and balls that reached the seats on a bounce became automatic doubles (often referred to as a ground rule double). The last "bounce" home run in MLB was hit by Al López of the Brooklyn Robins on September 12, 1930, at Ebbets Field. A carryover of the old rule is that if a player deflects a ball over the outfield fence in fair territory without it touching the ground, it is a home run, per MLB rule 5.05(a)(9). Additionally, MLB rule 5.05(a)(5) still stipulates that a ball hit over a fence in fair territory that is less that 250 feet (76 m) from home plate "shall entitle the batter to advance to second base only", as some early ballparks had short dimensions.
  Also until circa 1931, the ball had to go not only over the fence in fair territory, but it had to land in the bleachers in fair territory or still be visibly fair when disappearing from view. The rule stipulated "fair when last seen" by the umpires. Photos from that era in ballparks, such as the Polo Grounds and Yankee Stadium, show ropes strung from the foul poles to the back of the bleachers, or a second "foul pole" at the back of the bleachers, in a straight line with the foul line, as a visual aid for the umpire. Ballparks still use a visual aid much like the ropes; a net or screen attached to the foul poles on the fair side has replaced ropes. As with American football, where a touchdown once required a literal "touch down" of the ball in the end zone but now only requires the "breaking of the [vertical] plane" of the goal line, in baseball the ball need only "break the plane" of the fence in fair territory (unless the ball is caught by a player who is in play, in which case the batter is called out).
  Babe Ruth's 60th home run in 1927 was somewhat controversial, because it landed barely in fair territory in the stands down the right field line. Ruth lost a number of home runs in his career due to the when-last-seen rule. Bill Jenkinson, in The Year Babe Ruth Hit 104 Home Runs, estimates that Ruth lost at least 50 and as many as 78 in his career due to this rule.
  Further, the rules once stipulated that an over-the-fence home run in a sudden-victor
caption: The Polo Grounds left field foul line with guide rope, as seen from upper deck, 1917
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