Donald Edwin Osborn (June 23, 1908 – March 23, 1979) was an American pitcher and manager in minor league baseball and a scout, farm system official and pitching coach at the Major League level. Born in Sandpoint, Idaho, Osborn threw and batted right-handed, stood 6 feet (1.8 m) tall and weighed 185 pounds (84 kg). He died in Torrance, California, during spring training in March 1979.