Key moment:Cullen's goal at 9:26 of the second period turned into the game-winner, but that's not why it was so important. It was the goal that broke the Rangers' backs. His second goal of the series gave the Penguins a 4-2 lead. Pittsburgh poured it on from there, scoring two more times before intermission to take a 6-2 lead into the third period. The Rangers clearly sagged after Cullen scored. Chris Kreider's goal in the third period allowed Cullen's goal to be the winner.
Unsung player of the game: Penguins defenseman Trevor Daley made the great pass to Rust to set up Pittsburgh's go-ahead goal at 5:21 of the second period. Daley also got to the puck first behind the goal line in the defensive zone to start the play that led to Cullen's goal. Daley finished with an assist, five shots and a plus-2 rating in 23:04 of ice time. Daley had another strong game for the Penguins. He's had a lot of them since being acquired in a trade with the Chicago Blackhawks on Dec. 14, the same day Sullivan coached his first game with the Penguins.
What's next: The Penguins wait. The Rangers move on to the start of an offseason that should be quite interesting. New York defenseman Dan Boyle, who was scratched Saturday, said earlier in the season this was likely going to be his last. He has given no indication he has veered from that decision. Forward Eric Staal and defenseman Keith Yandle can become unrestricted free agents on July 1. Kreider and forwards J.T. Miller and Kevin Hayes, who was scratched for Games 4 and 5, can become restricted free agents.