Herold Dominic "Muddy" Ruel (February 20, 1896 – November 13, 1963) was an American professional baseball player, coach, manager and general manager. He played as a catcher in Major League Baseball from 1915 to 1934. One of the top defensive catchers of his era, Ruel was notable for being the personal catcher for Baseball Hall of Fame pitcher, Walter Johnson and for scoring the winning run for the Washington Senators in Game 7 of the 1924 World Series. He also played for the St. Louis Browns, New York Yankees, Boston Red Sox, Detroit Tigers, and the Chicago White Sox during a career that lasted 19 seasons. After his playing career, Ruel served as a coach and a baseball executive.