"We wanted to jump on them early, they had lost a few in a row there, and make it so they can't go into their shutdown mode when they get in the lead," defenseman Mark Eaton said.
The Penguins are tied in points with the Flyers for the fourth spot and home-ice advantage in the first round of the playoffs.
"That's the thing we're trying to chase right now - we're not worrying about people tying to catch us, we're trying to catch Philly," said goalie Marc-Andre Fleury, who stopped 24 shots and picked up an assist on Guerin's goal. "We want to keep winning. That would be huge, home-ice advantage."
In other games:
* At Washington, Mike Green's two power-play goals less than 1 1/2 minutes apart in the third period and Alex Ovechkin's NHL-leading 54th tally helped the Capitals beat the New York Islanders, 5-3.
* At Atlanta, Ilya Kovalchuk scored on an unassisted breakaway with 29.9 seconds left in overtime to give the Thrashers a 3-2 win over Buffalo.
* At Chicago, Nikolai Khabibulin made 16 saves, and Jonathan Toews, Samuel Pahlsson and Colin Fraser scored for the Blackhawks, who beat St. Louis, 3-1.
* At Denver, Al Montoya stopped 23 shots for the Phoenix Coyotes in a 3-0 shutout of the Colorado Avalanche.
* The Toronto Maple Leafs have been fined $500,000 by the NHL and stripped of a fourth-round draft pick because of how they handled the signing of Swedish defenseman Jonas Frogren, apparently circumventing the league's collective bargaining agreement. *