The 1951 National League tie-breaker series was a best-of-three playoff series at the conclusion of Major League Baseball's (MLB) 1951 regular season to decide the winner of the National League (NL) pennant. The games were played on October 1, 2, and 3, 1951, between the New York Giants and Brooklyn Dodgers. It was necessary after both teams finished the season with identical win–loss records of 96–58. It is most famous for the walk-off home run hit by Bobby Thomson of the Giants in the deciding game, which has come to be known as baseball's "Shot Heard 'Round the World".