[deadballera]

On Wednesday, September 23, 1908, while playing for the New York Giants in a game against the Chicago Cubs, while he was 19 years old (the youngest player in the NL), Merkle committed a base running error that later became known as "Merkle's Boner" and earned Merkle the nickname of "Bonehead."

In the bottom of the 9th inning, Merkle came to bat with two outs, and the score tied 1-1. At the time, Moose McCormick was on first base. Merkle singled and McCormick advanced to third. Al Bridwell, the next batter, followed with a single of his own. McCormick advanced to home plate, apparently scoring the winning run. The fans in attendance, under the impression that the game was over, ran onto the field to celebrate.

Meanwhile, Merkle, thinking the game was over, ran to the Giants' clubhouse without touching second base. Cubs second baseman Johnny Evers noticed this, and after retrieving a ball and touching second base he appealed to umpire Hank O'Day, who would later manage the Cubs, to call Merkle out. Since Merkle had not touched the base, the umpire called him out on a force play, meaning that McCormick's run did not count.