Chris Kunitz started Pittsburgh's third-period surge with his 18th goal of the season and Sutter beat Boston's Anton Khudobin twice in less than four minutes, including the game-winner with 2:03 remaining.
Marc-Andre Fleury stopped 14 shots for the Penguins, who broke loose late against the NHL's best defensive team.
Zdeno Chara and Tyler Seguin scored first-period goals for the Bruins. Khudobin made 31 saves and the Bruins kept Pittsburgh's high-powered offence in check until the final minutes of a matchup between two of the Eastern Conference's best teams.
You forget how good [Nieuwendyk] was. You hear the points and stuff and you almost forget until they kind of walk you through his career, and that was really cool for me. I might have felt it a little more than some of the other guys because he was one of my favorites growing up, but that was very cool and I'm honored to have been a part of it. I had chills the entire ceremony.
— Calgary's Joe Colborne on the "Forever a Flame" ceremony for Joe Nieuwendyk