PHILADELPHIA, May 15 (UPI) -- Jeoffrey Lupul scored the first of Philadelphia's three opening-period goals Thursday and the Flyers kept their season alive with a 4-2 victory over Pittsburgh.
The Penguins lead the Eastern Conference Finals 3-1 and will try to earn a spot in the Stanley Cup Finals at home Saturday in Game 5.
Philadelphia scored more goals in the first period Thursday than it had in any of the first three games of the series.
Pittsburgh got two goals from Jordan Staal in the third period, the second coming with 5:49 remaining in regulation, but Martin Biron was perfect the rest of the way and Lupul clinched it by scoring into an empty net with 32 seconds to play.
Biron made 36 saves and Pittsburgh's Marc-Andre Fleury had 30.
The loss was only the second for the Penguins in this year's playoffs. The Penguins swept the Ottawa Senators in the opening round and defeated the New York Rangers in five games in the conference semifinals.