Matt Duchene scored again, Reto Berra made 27 saves and the Avalanche beat the Devils 2-1 on Tuesday night at Prudential Center.
Kyle Palmieri scored and Cory Schneider made 23 stops for the Devils, who lost their third straight at home.
Duchene had a franchise-record 11 November goals, and picked up right where he left off on the first day of December. He opened the scoring at 2:10 of the second period with a shot from the right circle that hit Schneider in the left arm and trickled into the net.
Tyson Barrie also scored for Colorado, which got its third win in the last eight games.