William Harold Southworth (March 9, 1893 – November 15, 1969) was an American right fielder, center fielder and manager in Major League Baseball (MLB). As a player in and and from to for five big-league teams, Southworth took part in almost 1,200 games, fell just short of 1,300 hits and batted .297 lifetime. Southworth managed in and from through . He oversaw three pennant-winning St. Louis Cardinals teams, winning two World Series, and another pennant with the Boston Braves, the last National League title in Boston baseball history. As manager of the Cardinals, his .642 winning percentage is the second-highest in franchise history and the highest since 1900.