The goals that did beat him were either off sticks, or because of heavy traffic in front, limiting his view.
"I thought Smitty was real good," Peters said. "He was good on the trip and that's an encouraging sign."
The Penguins evened the score late in the first off a missed call the other way.
Marcus Pettersson blatantly interfered with Austin Czarnik, stunning the winger with a crushing blow as he raced to a loose puck in the neutral zone. Sam Bennett stepped up, dropped the mitts with the beleaguered Pens blueliner and shocked him with a series of rights.
Bennett, though, picked up the only penalty - a roughing minor.
"I didn't like the hit," he said. "When I see one of my teammates getting hit like that, I think there needs to be a response."
Justin Schultz - who missed the past 53 games with a fractured left leg - floated one on goal, and Jake Guentzel tipped home his team-leading 28th of the year to make it a 1-1 game at 17:41.
But the Flames came out of the gates red-hot and opened the second with two quick goals to adopt a 3-1 lead before the five-minute mark.
First, Murray was unable to corral a Rasmus Andersson point shot, allowing Frolik to swoop in and swat it home on the backhand. Then, Czarnik took a pass on his off wing, settled a bouncing puck and screamed home a knuckler, beating the goalie under the arm for his third of the year.