Joe Sullivan (September 26, 1910 – April 8, 1985), was a left-handed American baseball pitcher. Sullivan played professional baseball from 1931 to 1949, including five seasons in Major League Baseball with the Detroit Tigers (1935–36), Boston Bees / Braves (1939–41), and Pittsburgh Pirates (1941). In five major league seasons, he compiled a record of 30–37 with a 4.01 earned run average (ERA). A knuckleball specialist, Sullivan once pitched 12 straight scoreless innings as a relief pitcher.