Robert Antell Sims Jr. (October 9, 1938 – March 21, 2006) was an American professional basketball player in both the National Basketball Association (NBA) and American Basketball Association (ABA). Sims was selected in the 1960 NBA Draft by the St. Louis Hawks after a collegiate career at Pepperdine University. In his NBA/ABA career, Sims averaged 7.7 points, 2.7 rebounds and 2.3 assists per game.