Brad Marchand scored his 50th career playoff goal, David Pastrnak and Jake DeBrusk also scored, and the NHL-best Boston Bruins opened the playoffs by beating the Florida Panthers 3-1 on Monday night.

Linus Ullmark, a Vezina Trophy candidate who led the league in wins (40), goals-against average (1.89) and save percentage (.938), stopped 31 shots and Tyler Bertuzzi added two assists for Boston, which controlled the game even with captain Patrice Bergeron sitting out because of illness.

Matthew Tkachuk scored for the Panthers and Alex Lyon made 26 saves but gave up Marchand’s goal on a relatively easy shot.

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Garnet Hathaway and Colin White scuffle

Garnet Hathaway #21 of the Boston Bruins and Colin White #6 of the Florida Panthers shove each other during the second period of Game One of the First Round of the 2023 Stanley Cup Playoffs at the TD Garden on April 17, 2023 in Boston, Massachusetts.  (Rich Gagnon/Getty Images)

Game 2 is Wednesday night in Boston.

The Bruins captured the Presidents’ Trophy, setting NHL records in points (135) and wins (65). Florida, last season’s No. 1 seed, earned the Eastern Conference’s eighth and final playoff spot with a late-season push.

It’s the first playoff matchup between a No. 1 seed and the Presidents’ winner from the previous season since the award was introduced in 1985-86.

Pastrnak, a 61-goal scorer this season, was on the opposite side on the right wing from his usual spot on the power play. Bertuzzi collected the rebound of David Krejci’s shot in the slot and sent a quick backhand pass to Pastrnak, who snapped the puck into the net at 5:58 of the opening period.

BRUINS SET NEW NHL RECORD AFTER BEATING FLYERS FOR 63RD WIN OF SEASON

Lyon gave up the soft goal early in the second when Marchand fired a seemingly harmless shot from the top of the left circle. Lyon bent down to catch it and it tipped off his glove, caroming into the net after hitting the inside of the right post.

Soon after, the TD Garden crowd started serenading him with chants of "Lyon! Lyon!"

Florida cut the lead in half when Boston defenseman Dmitry Orlov sent a blind, backhand pass directly out front, where Tkachuk collected it and flipped the puck past Ullmark at 6:34 of the second.

Jake DeBrusk celebrates goal

Jake DeBrusk #74 of the Boston Bruins celebrates his goal against Alex Lyon #34 of the Florida Panthers during the second period of Game One of the First Round of the 2023 Stanley Cup Playoffs at the TD Garden on April 17, 2023 in Boston, Massachusetts. (Rich Gagnon/Getty Images)

DeBrusk restored the two-goal lead when he dove into a pile and knocked the puck into the net out of a scramble near the crease late in the second.

As it did to so many opponents during its record-setting season, Boston bottled up Florida in the third.

HIGHLIGHT STOPS

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The 30-year-old Lyon, undrafted and essentially a career minor leaguer, made a pair of splendid stops after Boston took its 1-0 lead, coming across to make a left pad save on Bertuzzi’s redirect from the edge of the crease and sliding across to stop Trent Frederic’s chance. He robbed Frederic again late in the second.

AILING CAPTAIN

Bergeron left the regular-season finale in Montreal in the first period with an upper-body injury, then missed practice Saturday and Sunday.

"We have not only Bergeron, but a couple of guys that have been under the weather," coach Jim Montgomery said after the morning skate.

David Pastrnak celebrates goal

David Pastrnak #88 of the Boston Bruins celebrates after he scored against the Florida Panthers during the first period of Game One of the First Round of the 2023 Stanley Cup Playoffs at the TD Garden on April 17, 2023 in Boston, Massachusetts. (Rich Gagnon/Getty Images)

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NOTES: Krejci missed the last six games of the regular season with a lower-body injury. ... Bruins D Derek Forbort returned to the lineup. He hadn’t played since mid-March because of a lower-body injury. D Matt Grzelcyk was a healthy scratch ... Panthers C Aleksander Barkov was in the lineup after missing Sunday’s practice. ... Florida G Sergei Bobrovsky, a two-time Vezina winner, was the backup. He hasn’t played since March 27 because of a non-COVID illness. ... Florida led the league in shots on goal per game with 36.82.