In the midst of another slow season in 2008–09, he was traded to the Pittsburgh Penguins along with prospect Eric Tangradi for defenceman Ryan Whitney. The move was also precipitated by a need for secondary scoring on the Penguins behind Sidney Crosby and Evgeni Malkin. During the 2009 playoffs, he recorded 1 goal and 13 assists as the Pittsburgh Penguins won the Stanley Cup in a rematch of the previous year's Stanley Cup Finals against the Detroit Red Wings, giving Kunitz his second championship in three years.