Merkle's Boner refers to the notorious base-running mistake committed by rookie Fred Merkle of the New York Giants in a game against the Chicago Cubs on September 23, 1908. Merkle's failure to advance to second base on what should have been a game-winning hit led instead to a force play at second and a tied game. The Cubs later won the makeup game, which proved decisive as they beat the Giants by one game to win the National League (NL) pennant for 1908. It has been described as "the most controversial game in baseball history".