Austin Jay Knickerbocker (October 15, 1918 – February 18, 1997) was an American professional baseball player whose 11-season career included 21 Major League games played for the Philadelphia Athletics during the 1947 season. An outfielder, he threw and batted right-handed, stood 5 feet 11 inches (1.80 m) tall and weighed 185 pounds (84 kg).