Born March 22, 1947 Bob Portman played in the NBA mainly as a Forward during their playing career, season(s): 1970-1973. Robert M. Portman is an American former professional basketball player. At 6'6" and 200 lb. he was positioned as a forward. Portman attended Creighton University in Omaha, Nebraska, and played for three seasons. He left Creighton as the school's all-time leading scorer, a mark that stood for 22 seasons.