Warren Spahn played his entire 21-year baseball career in the National League. He won 20 games or more in 13 seasons, including a 23–7 record when he was age 42. Spahn was the 1957 Cy Young Award winner, and was the runner-up three times, all during the period when one award was given, covering both leagues. He was elected to the Baseball Hall of Fame in 1973, with 83% of the total vote. Spahn chose to enlist in the United States Army, after finishing the 1942 season in the minors. He served with distinction, and was awarded a Purple Heart. He saw action in the Battle of the Bulge and at the Ludendorff Bridge as a combat engineer, and was awarded a battlefield commission. Spahn returned to the major leagues in 1946 at the age of 25, having missed three full seasons. Had he played, it is possible that Spahn would have finished his career behind only Walter Johnson and Cy Young in all-time wins.