"A good chunk of guys have been a part of this, this rivalry, for a while," said Crosby, the Pittsburgh captain, who has scored 115 points (49 goals, 66 assists) in 77 games against Philadelphia. "[Games] seem to be more intense. More emotional. That should bring out everyone's best."
Jake Guentzel had a goal and two assists, Evgeni Malkin had two assists, and Tristan Jarry made 30 saves for the Penguins (35-16-3), who have won seven of their past nine and are two points ahead of the second-place Washington Capitals in the eight-team division.
Malkin missed 23 games because of a lower-body injury before returning with an assist in a 7-2 loss to the Flyers here Monday to open the back-to-back set.
Brian Elliott made 24 saves in his 500th NHL game, and Claude Giroux had two assists for the Flyers (23-23-7), who have lost four of five.
"It was really special," Elliott said. "To be able to play 500 games in this league is an accomplishment I'm really proud of. I tried to soak it in and enjoy the moment. It's not ideal the way it turned out, but it's kind of how the season was going a little bit."
The Penguins, Capitals, Boston Bruins and New York Islanders have clinched the four Stanley Cup Playoff berths from the East.
"I know, as a group, we weren't pleased with the effort that we had last night," Penguins coach Mike Sullivan said. "We wanted to be better. I thought, to a man, we were a much better team tonight. I thought it started with our leaders."