William Earl Marriott (August 18, 1893 – August 11, 1969) was an American professional baseball third baseman. He played in Major League Baseball (MLB) for the Chicago Cubs, Boston Braves and Brooklyn Robins over six seasons from 1917 to 1927. He also played for the United States national baseball team, composed of active servicemen, at the 1919 Inter-Allied Games held in Paris in the aftermath of the First World War.