Vegas Coach Bruce Cassidy acknowledges applause while honored in a video tribute for his stint as head coach of the Boston Bruins during the first period Monday night in Boston. Charles Krupa/Associated Press

BOSTON — The Vegas Golden Knights made former Boston coach Bruce Cassidy’s return a success on Reilly Smith’s score in the fifth round of the shootout, beating the Bruins 4-3 to end their NHL-record for home victories to open a season at 14 games on Monday night.

Cassidy was fired by Boston following 5 1/2 seasons in June after the Bruins were eliminated by Carolina in the opening round of the playoffs.

Eight days after he was let go, he was hired by Vegas.

In a matchup of two of the league’s top three teams, Western conference-leading Vegas opened a 3-0 lead early in the second period on two goals by Paul Cotter and the other by Jonathan Marchessault before the Bruins started their comeback when Brad Marchand and David Pastrnak scored just over six minutes apart late in the period.

They tied it on Taylor Hall’s power-play goal 3:08 into the third when he spun in front and slipped a shot from the slot past goalie Logan Thompson.

Smith had the only score in the shootout, slipping a forehand shot past Jeremy Swayman.

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Cassidy took over as Boston’s interim coach on Feb. 7, 2016, before getting the head job that April. His teams made the playoffs all six seasons, including a trip to the 2019 Stanley Cup Final when they lost the seventh game at home against St. Louis.

The Bruins’ home-opening streak broke the record of 11 that was set by the 1963-64 Chicago Blackhawks and equaled by the Florida Panthers last season.

Before the shootout, Thompson made 40 saves. Swayman had 21.

Cotter collected William Karlsson’s pass inside the left circle and unloaded a wrister under the crossbar 1:36 into the game.

Marchessault stole Pastrnak’s attempted clearing pass, broke in alone and tucked in his own rebound to make it 2-0.

Cotter’s second came 51 seconds into the second period when he slipped a wrister past Swayman’s glove.

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TRIBUTE

The Bruins played a video montage of Cassidy on the Jumbotron late in the opening period that ended with a picture of him and said: “Welcome back, Bruce.”
The crowd gave him a nice ovation and he waved thanking them.

FOR THE RECORD

Cassidy finished tied for third on the Bruins’ coaching list with Hall of Famer Milt Schmidt (1955-66) at 245 victories, behind Claude Julien’s (2008-17) 419 and Art Ross (1925-45) with 387.