Donald O'Neal Lassetter (March 27, 1933 – January 22, 2024) was an American professional baseball player. The outfielder appeared in four Major League Baseball games as a member of the 1957 St. Louis Cardinals, but spent the remainder of his eight-season career in minor league baseball.
Lassetter attended the University of Georgia, threw and batted right-handed, stood 6 feet 3 inches (1.91 m) tall and weighed 200 pounds (91 kg). His 13-at-bat Major League trial with the 1957 Cardinals occurred after he hit 27 home runs and knocked home 84 runs batted in for Triple-A Omaha of the American Association. His two MLB hits included a triple off Dick Drott of the Chicago Cubs on September 27, 1957.
Lassetter died on January 22, 2024, at the age of 90.