Harry William Walker (October 22, 1918 – August 8, 1999) was an American professional baseball player, coach and manager. Known by the nickname "Harry the Hat", he played as a center fielder in Major League Baseball between 1940 and 1955, most notably as a member of the St. Louis Cardinals with whom he won two world championships and was the 1947 National League batting champion. A two-time All-Star player, Walker also played for the Philadelphia Phillies, Chicago Cubs and the Cincinnati Reds. After his playing career, he served as manager for three major league teams between 1955 and 1972.