With several new faces inserted into their opening night roster, the Boston Bruins were looking for an energy boost. They needed to look no further from the third and fourth lines in their season opener against the Philadelphia Flyers Wednesday night at the TD Garden.

As David Krejci was put on injured reserve to start the 2014-15 campaign, head coach Claude Julien had to jumble some of his lines. Loui Eriksson, who had skated with Krejci and Milan Lucic for the majority of the preseason, was slotted along with Chris Kelly and fellow Swede Carl Soderberg. With the Patrice Bergeron line in tact (with linemates Reilly Smith and Brad Marchand), and Milan Lucic trio’ed with Ryan Spooner and Matt Fraser, the Bruins’ new look fourth line on this night consisted of Daniel Paille – playing in his 500th game – Craig Cunningham and Bobby Robins.

The Black and Gold were looking for strength in numbers and they certainly got that in their 2-1 season opening victory. But the two trios that stood out the most were Kelly-Soderberg-Eriksson and Paille-Cunningham-Robins.

The Flyers were buzzing after Sean Couturier deflected a Jakub Voracek pass past Tuukka Rask to tie the game at one just 4:19 into the third period. They also had a golden chance to take a lead when Patrice Bergeron was called for holding at 7:11. Once the Bruins killed it off, however, things changed.

On Boston.com: Kelly’s Return Sparks Bruins

And guess who provided the spark? The Bruins energy lines.

“I think someone said before the game, everyone’s is here for a reason and everyone has a job to do,” said Kelly, who skated in his first game in six months . “I think it was great to see Bobby Robins play his first NHL game and have an impact. Cunny [Cunningham] played extremely well. It was important taking faceoffs, killing penalties. I think a lot of those times, they didn’t let those guys enter. Those are just two of many that played well.”

Robins got into his first NHL fight with Luke Schenn after delivering a big time hit to Flyers pest Zac Rinaldo. He later played a crucial role late in the third to change the tide as he drew a slashing penalty on Schenn. That sequence started with the third line grinding out the Flyers and spending nearly a minute in the attacking zone, while Cunningham (four hits), Robins (seven hits) and Paille followed up with their speed and strength to outwork the Philly defense.

“They’re both great players. I loved playing with those guys,” Robins said about skating with Paille and Cunningham. “I’ve played with Cunny before down in Providence, so we have some good chemistry. When we were rolling, especially that last shift there when we drew a penalty, I think we’re a really effective line. If we can get in on that forecheck every shift we’re going to be a dangerous fourth line.”

The ensuing Bruins power play was not successful, but moments later, one of the energy lines delivered again. With under two minutes left, Kelly got a fortunate bounce off a shot from McQuaid that broke his stick. Once the puck was behind Flyers netminder Steve Mason, the veteran pounced on it and put home the game-winner.

It was a prototypical dirty goal, but it was also a fitting ending.

“There was a lot going on around the crease area at the time the puck got through,” said Julien, who admitted that he didn’t have the best look at Kelly’s game-winner. “I’m going to have to look at it and explain a little later.”

Hear what the Bruins had to say following their 2-1 opening night victory over the Flyers: