Devils coach Sheldon Keefe said the game was a good lesson for the coaching staff in how best to use Glass moving forward.
"Players love to score, so that helps," he said. "And then it endears yourself to your teammates just a little bit more as well. ... The more we get to know those guys, I think for myself as a coach, I'll know better how to utilize them and all that kind of stuff.
“But what a good impression made by those guys today here."
Haula made it 2-0 at 5:39 of the second period. Jonathan Kovacevic's shot redirected off traffic at the top of the hash marks and went to Haula, who drove down the right side and beat Fedotov past his glove.
It was the forward's first goal in 29 games, dating to Nov. 25.
"I don't know if I've ever been on a schneid like that before," Haula said. "It was getting a little frustrating, for sure, but just a little spark of a couple new guys and some fresh, positive energy."
Drysdale, playing his 200th NHL game, ended Allen’s shutout bid when he cut it to 2-1 at 15:14 of the third period after a breakout pass from Travis Konecny.
"We were connected better, we defended better," Flyers coach John Tortorella said. "[The Devils] defend well as a team. Had some action around their net, we couldn't get to rebounds. They did a pretty good job of that. We played better than the last game (4-1 loss to Seattle on Saturday). Just trying to take a step forward."
Dawson Mercer scored an empty-net goal on New Jersey's only power play at 19:42 for the 3-1 final.
NOTES: Glass is the third player to score in his Devils debut this season, joining Paul Cotter and Kovacevic, who each did it Oct. 4. He was plus-2 in 12:21 of ice time. ... Sprong had three shots on goal in 11:24. ... Defenseman Dennis Cholowski played 13:27 in his Devils debut after being acquired in a trade with the New York Islanders on Friday. ... The Flyers went 0-for-1 on the power play and are 0-for-12 in their past five games. … Seeler had a game-high six hits and blocked three shots in 16:53.