 He was drafted in the eighth round (80th overall) of the 1967 NBA draft by the Baltimore Bullets.In four NBA seasons with the Bullets, Chicago Bulls and Portland Trail Blazers, Manning averaged 5.1 points and 4.5 rebounds per game.He then played five seasons in the ABA—three with the Carolina Cougars and one each with the New York Nets and Indiana Pacers—averaging 6.6 points and 4.5 rebounds per game.