 Making his NHL debut with the Chicago Black Hawks in 1970-71, Korab was asked to keep the front of his own net clear.He continued to play the same role for the next two seasons while scoring 12 goals in 1972-73 and helping Chicago reach the Stanley Cup finals in 1971 and 1973.Korab's best years were spent on the blueline of the Buffalo Sabres from 1973 to 1980, where he blossomed into an effective defenceman on one of the best young teams in the league.