Ronald Darrell Thomas (born March 8, 1955) is an American former NASCAR driver who drove in the Winston Cup series from 1977 to 1989 and the Busch Series in 1982 and 1985. He was the 1978 NASCAR Winston Cup Rookie of the Year, edging out Roger Hamby in a race that went down to the wire at the Los Angeles Times 500. Thomas's father, Jabe Thomas was also a NASCAR driver. In 1980, his best season he finished fourteenth in the points in the No. 25 Stone's Cafeteria car. He led a career total of four laps in Winston Cup competition.