"If he's not there, there's no goal, probably," Bruins coach Claude Julien said after the win. "He did a great job, he hasn't played in a while…give him credit. He came, he played hard and he got an opportunity to get back into the lineup."
Julien made sure to compliment the work ethic of the Dorchester native, who had not played since Jan. 8 in Carolina.
"What people don't realize is that he worked extremely hard throughout the summer - he came in in great shape," continued Julien. "He did a lot of adjustments to his training, his lifestyle and everything else.
"He's had a tough start, and it's too bad because right now in that dressing room he has a lot of players hoping that he can really get himself going."
Hayes suited up alongside Dominic Moore and Tim Schaller on Boston's fourth line and knew his role was to try to provide some energy each time he hit the ice.
"It's always a great feeling to get back in," Hayes said Thursday morning as the Bruins prepared for their tilt with the Penguins at TD Garden. "You sit out for a while and your number gets called again, you have to be ready to go.
"You just gotta get out there and get back to basics, find a way to create energy. You've got to find a way to contribute if you're not scoring, do the little things. I think that's what our line did as a unit the other night."
Hayes, who has two goals and an assist this season, believes Moore and Schaller complement his game well.
"They both play a really hard-nosed game," said Hayes. "I think Dom Moore doesn't get enough credit for the skill he has, he's been scoring all types of goals this year and making lots of plays.
"Timmy Schaller's been finding those soft spots all year and capitalizing. I think those guys play hard, play a simple game and we can feed off each other."
If Hayes is able to stay in the lineup against the Penguins, he'll make sure he's using his big body in front of the net once again.
"That's what I'm going to have to continue to do," said Hayes. "Gonna have to get to that area, that's where I'm going to be successful, that's where I'm going to have to score from.
"If you're not putting them in you have to find ways to help other guys put them in."