Bruins goaltender Tuukka Rask makes one of his xx saves as defenseman Mike Reilly and Washington’s Carl Hagelin look for the rebound in Game 5 of their first-round playoff series Sunday in Washington. Boston wrapped up the series with a 3-1 win. Nick Wass/Associated Press

WASHINGTON — David Pastrnak couldn’t control his excitement with the opportunity to help the Boston Bruins advance in the playoffs, and captain Patrice Bergeron approached the clinching game as if it was the reason he played hockey.

It showed.

With Pastrnak, Bergeron and goaltender Tuukka Rask leading the way, the Bruins eliminated the Washington Capitals in five games with a 3-1 victory Sunday night. Pastrnak dazzled with a highlight-reel goal, Bergeron scored twice at timely moments and Rask made 40 saves to set up a second-round showdown against either the Pittsburgh Penguins or New York Islanders.

“These games are fun,” Pastrnak said. “The feeling you get with the guys after the game in the locker room and the happiness like little kids, it’s something that you play the game for.”

Chants of “TUUKK!” emanated from a large group of black and gold-clad Boston fans who were part of the limited-capacity sellout crowd of 5,333. Those were occasionally interrupted by “We want the Cup!” – the trophy the Bruins last won a decade ago after a 39-year title drought.

They’re 12 wins away, thanks to their best players dominating in Game 5.

“Let’s face it: Our top guys came through,” Coach Bruce Cassidy said.

Pastrnak made it look easy, putting the puck behind his back and through his legs. He assisted on Bergeron’s first goal and was part of an effort in front of Rask that kept most of the Capitals’ shots to the outside. Bergeron, who got the captain’s “C” when Zdeno Chara left to sign with Washington, beat Ilya Samsonov with a stoppable shot in the second period and stunted a comeback bid with an unassisted goal in the third.

“That’s why you play the game: It’s the adrenaline and the feeling that you get,” said Bergeron, who has 24 points in potential clinching games throughout his career. “It’s always special. It’s always fun to be a part of it.”

The only shot that beat Rask was Conor Sheary hammering home his own rebound 11 seconds into the third period. That ended an even-strength goal drought of 147:44, but wasn’t enough to rally the Capitals, who outshot the Bruins 41-19 and had a would-be goal by Lars Eller with 5:37 remaining waved off for goaltender interference.

“I felt good the whole series,” Rask said. “This game today was probably the most chances and shots they had the whole series. That’s one of the reasons that it looked like I was in the zone.”

Boston won four in a row against Washington after losing the series opener in overtime. After eking out Game 2 in overtime and Game 3 in double overtime, the Bruins capitalized on an aging, banged-up opponent with few answers for their speed and skill.

“It was tight series, interesting series,” Capitals captain Alex Ovechkin said. “It’s tough for us. It’s hard.”

It’s a third consecutive first-round exit for Alex Ovechkin and the Capitals since they won the Stanley Cup in 2018. This defeat comes after Cup-winning coach Peter Laviolette was brought in for an organization in win-now mode, with Ovechkin in the last year of his contract at age 35 and opportunities running out.

While the Bruins joined the Presidents’ Trophy-winning Colorado Avalanche as the first teams to advance, the Capitals face a litany of questions this offseason about Ovechkin, center Evgeny Kuznetsov and the goaltending position at large.

“We just lost in a playoff series,” Ovechkin said. “Let’s talk about my contract and all those stuff later on.”

FIRST-TIMERS

Bruins trade deadline pickups Taylor Hall, Curtis Lazar and Mike Reilly all reached the second round of the NHL playoffs for the first time. Hall won a five-game qualifying round series with Arizona last year, but this is his deepest postseason run after not making it his first seven seasons.

CHARA’S LAST STAND?

Chara became the ninth defenseman in NHL history to appear in 200 playoff games. Those are in addition to his 1,608 games in the regular season.

Playoff game 200 could be Chara’s last. The longtime Bruins captain who lifted the Cup in 2011 signed with Washington on a one-year deal and turned 44 in March.

“Zee’s done a good job,” Laviolette said. “He’s come in and he’s provided good defense and penalty kill and he’s a big body out there.”

TINORDI TIME

Jarred Tinordi got the call to replace injured defenseman Kevan Miller on Boston’s blue line against the team his dad, Mark, helped reached the 1998 Stanley Cup final. Tinordi was 6 at the time and recalls watching most games on TV with his siblings and mom.

Those roles are now reversed, with Mark tuning in to catch games when his son is in the lineup and offering some tips along the way.

“My whole career he’s been helping me out, giving me good advice,” Tinordi said. “He was a guy as a player that went to two Cup finals, and so he has the playoff experience that if I need to lean on him or something, he’s there for me. He’s been great this whole time.”