Donald O'Neal Lassetter (born March 27, 1933) is an American former 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.