John Warren Marin is an American former professional basketball player. A 6 ft 7 in small forward from Duke University, Marin was named to the 1967 NBA All-Rookie Team and spent 11 seasons in the National Basketball Association (1966–1977), playing for the Baltimore Bullets, Houston Rockets, Buffalo Braves, and Chicago Bulls. The left-handed Marin was a two-time NBA All-Star and scored 12,541 points in his career. He led the NBA in free throw percentage during the 1971–72 NBA season.