Flyers goalie Anthony Stolarz started after playing Friday in a 4-1 loss to the Edmonton Oilers, but he allowed two goals on four shots before leaving with a lower-body injury at 8:14 of the first period.
Alex Lyon made 17 saves in relief while emergency backup goalie Rylan Toth, who plays at the University of British Columbia, waited outside the locker room. Toth, who played three seasons in the Western Hockey League, did not come to the bench and would have signed a contract only if Lyon was injured.
Philadelphia coach Dave Hakstol did not have an update on Stolarz after the game.
Hakstol bristled at questions about the Flyers hanging their heads after falling behind in the first period for the fifth game in a row.
"Didn't happen tonight. Unless you watched a different game than I watched," he said. "Our guys pushed like [heck] all the way through that game, so that didn't happen."
Tanev scored on a delayed penalty to make it 1-0 at 4:13, skating into the slot unchecked before lifting a backhand under the Stolarz's blocker arm for his first goal of the season.
"No one was really around," Tanev said. "The seas almost parted."
Eriksson scored on a wrist shot from the slot to make it 2-0 at 8:09.
"The first two were probably the first two scoring chances against," Hakstol said. "It's tough when you are battling from behind, but we did battle."
Leivo scored with a sharp-angled shot that bounced past Lyon off defenseman Andrew MacDonald's skate to make it 3-0 at 11:12.
Laughton scored on a solo rush at 16:29 of the first to make it 3-1.
"It's a pretty empty feeling right now," Laughton said. "We've got a tight group off the ice, but it's got to translate on the ice and it's got to happen quick here."
Boeser made it 4-1 at 12:07 of the second period on a screened shot from the blue line off a give-and-go with Troy Stecher after a won face-off by Elias Pettersson, who extended his point streak to six games (three goals, nine assists).
"Honestly, I was just trying to get a puck on net there and get a rebound," said Boeser, who has seven goals and two assists in his past eight games. "It was pretty lucky."
Granlund scored into an empty net with 4:31 remaining for the 5-1 final score.