Clarkson's tallies -- his eighth and ninth of the season -- boosted the Eastern Conference-leading Devils to a home-and-home weekend sweep of the Penguins.
Tomas Vokoun was touched for three goals on 23 shots as Pittsburgh was humbled by the Devils for a second time following a five-game winning streak.
James Neal provided Pittsburgh's only goal.
Chipotle plans first price increase in 3 years
Putin thinks Obama would save him if he were drowning