Kunitz took advantage of a fortunate bounce to give the Penguins a two-goal lead midway through the period. Devils defenseman Anton Volchenkov whiffed on a breakout attempt in his own zone and the puck slid to Kunitz, who was there to wrist a shot past Brodeur from between the circles.
"We had too many mistakes, the defense as a group," Devils captain Bryce Salvador said. "We have possession of the puck in our zone and we didn't get it out and it turned to scoring opportunities and goals."
The Penguins tried to take a three-goal lead on the power play, but the Devils cut the deficit in half with their NHL-best second short-handed goal of the season. Dainius Zubrus sent a spinning feed along the boards to a streaking Greene in the slot, and he went to the backhand to beat Fleury.
Letang started the third-period outburst less than 3 minutes in, sneaking into the slot to put a shot past Brodeur. Crosby, who has 10 points in his last four games against the Devils, made it 4-1 by finishing a rush down the left-wing boards with a wrist shot.
"It was a 2-1 game at the end of two periods," DeBoer said. "We came out in the third and had a couple good shifts and a couple opportunities to tie it, but it got away from us."
Bortuzzo sealed it with the first goal of his career 2 minutes later, when his shot from the point rolled awkwardly between Brodeur's pads. That sent the sellout crowd at the Consol Energy Center home happy for the first time all season.
"I like that we scored a lot of goals today and came out in the third and got three goals," Penguins coach Dan Bylsma said. "But the way we got them is more indicative of how we played the game."
NOTES: Penguins LW Zach Boychuk, picked up Thursday off waivers from Carolina, played 12 minutes, most of them alongside Malkin and James Neal. ... First-round draft pick Stefan Matteau was scratched for the Devils, who are deciding whether to return him to junior hockey after playing in five NHL games. ... Devils D Mark Fayne missed the game with an arm injury, while D Ben Lovejoy, C Dustin Jeffrey and C Eric Tangradi were scratched for the Penguins. ... It was the first of three games between the teams in nine days. ... Pittsburgh travels to Washington on Sunday in a game that will be nationally televised on NBC, while New Jersey visits the Islanders.