Dan Carcillo scored the lone goal for the Flyers, while goalie Brian Boucher was touched for all six Pittsburgh goals on 35 shots.
The Flyers' fading hopes for a win evaporated at 2:15 of the third period when Carcillo appeared to have scored, which would have brought Philadelphia to within 4-2. But a review of the play found he had directed the puck into the net with a kicking motion, and the score was wiped out.
Fedotenko followed with a score to give the Pens a four-goal edge with 7:43 left in the game.
Notable deaths of 2014 [PHOTOS]