Nelson Thomas Potter (August 23, 1911 – September 30, 1990) was an American professional baseball player and right-handed pitcher who appeared in 349 games in Major League Baseball over a dozen seasons between 1936 and 1949, most notably as a member, in 1944, of the only St. Louis Browns team to win an American League pennant. He also played for the St. Louis Cardinals, Philadelphia Athletics, Boston Red Sox and Boston Braves. Potter's repertoire featured the screwball.