Clifford Oldham "Cliff" Hagan (born December 9, 1931) is an American former professional basketball player. A 6-4 forward who excelled with the hook shot, Hagan, nicknamed "Li'l Abner," played his entire 10-year NBA career (1956–1966) with the St. Louis Hawks. He was also a player-coach for the Dallas Chaparrals in the first two-plus years of the American Basketball Association's existence (1967–1970).