Matt Grzelcyk scored at 1:40 of overtime and the surging Boston Bruins beat the Chicago Blackhawks 2-1 on Tuesday night.
After taking a cross-ice feed from Taylor Hall, Grzelcyk whipped the puck past goalie Marc-Andre Fleury to end it on Boston's 48th shot. Hall had two assists as Boston won its third straight to start a four-game trip and improved to 10-1-1 in its last 12 overall.
Grzelcyk, a defenseman, jumped up to the right circle skating on the 3-on-3 with Hall and high-scoring David Pastrnak. Grzelcyk netted his third goal - and second game-winner - in 53 games this season.
Fleury sparkled in net, making 46 saves as the Bruins dominated and outshot the Blackhawks 48-20. Fleury wasn't beaten until Patrice Bergeron snapped a scoreless tie early in the third on Boston's 40th shot.
Linus Ullmark made 19 saves for Boston.
Bergeron finally put the Bruins on the board at 4:43 of the third.
Boston kept the pressure on Chicago after its fourth power play expired. From a frantic scrum, Bergeron batted in his 17th goal, underneath Fleury and just over the goal line after Marchand and Hall had whacked at the puck.
Hagel tied it 1-all on a deflection at 9:36 of the third. Cutting across the crease, he screened Ullmark and tipped in Caleb Jones' shot.
An apparent go-ahead goal by Boston's Charlie Coyle with 4:45 left in regulation was waved off by referee Pierre Lambert because of goalie interference. Coyle turned and whipped in a loose puck, but Lambert ruled Craig Smith made contact with Fleury.
Cassidy challenged the on-ice ruling and asked for a video review. He lost the challenge but Chicago failed to convert the resulting power play.
The game headed to overtime with Boston leading 46-20 in shots.
The Blackhawks play at Minnesota on Saturday.