George Albert Hildebrand (September 6, 1878 – May 30, 1960) was an American professional baseball player and umpire. He played in 11 Major League Baseball games as a left fielder for the 1902 Brooklyn Superbas before becoming an American League umpire from 1913 to 1934. He is often credited as having invented the spitball while playing in the minor leagues. He was the umpire in four World Series (1914, 1918, 1922, 1926), and his 3,331 games as an umpire ranked third in American League history at the time of his retirement.