No matter how the summer’s blockbuster trade turns out — and we could be years away from determining the real winner — this one thing is certain: The Bruins’ 3-2 shootout loss to the Dallas Stars last night at the Garden had to smart a little bit for the brass.

After the B’s lost a late lead on a self-inflicted wound from two of their more veteran players, the teams went to a shootout. And who were the two Stars to beat goalie Tuukka Rask in the skills competition? None other than Tyler Seguin and Rich Peverley, the two players Bruins general manager Peter Chiarelli shipped out in a megadeal in July. Loui Eriksson, the key piece of the deal coming over from the Stars and playing in his first game back from a concussion, was among the B’s thwarted in the shootout.

Patrice Bergeron opened the scoring in the first round of the shootout, but Seguin — whom the Garden fans tried to torment with chants of “Se-guin!” much of the night — kept the Stars alive and Peverley won it in Round 4.

“You knew they were going to score somehow,” Rask said with a shake of the head. “You play against your old team, when you have a chance to score, you score. That’s hockey. That’s how I see it. It would have been awesome to stop them and chirp them after, but the tables have turned and they’re going to do that to me.”

While posting the extra point would have been nice, especially under last night’s circumstances, not many NHL teams would get all hot and bothered about a lost shootout. As Brad Marchand said, they are a “toss-up” whenever they occur.

It was the body of work that led his team to the shootout that had B’s coach Claude Julien vexed.

After their worst outing of the year Saturday in a loss to the New York Islanders, the Bruins came out flying against the Stars, despite giving up the first goal of the game to Jamie Benn just 3:38 into the first period. The B’s held a 15-1 shot advantage to start the game and tied it up on a pretty play. Torey Krug forced a turnover and then was there to tap in a pass from Reilly Smith, another piece to the offseason trade, less than a minute after Benn’s goal.

Thanks to a couple of power plays that went for naught, the Bruins pressured and pressured and pressured, until they just went flat. Though the Stars wouldn’t score again until late in the game, the visitors seized the momentum late in the first period and held it for much of the second, outshooting the B’s 13-4.

After losing a few too many battles in the third, it was a lunch-pail shift by the top line that produced a 2-1 lead. Milan Lucic and Jarome Iginla won a battle for a loose puck in front of the net and it went to David Krejci in the corner. Krejci hit defenseman Dougie Hamilton with a pass at the blue line and, with Lucic and Iginla still at the top of the crease, Hamilton fired a puck that went off Lucic and behind Dallas goalie Kari Lehtonen at 11:39.

But the B’s couldn’t hold the lead. Thanks to a bad line change between defensemen Zdeno Chara and Dennis Seidenberg, Vernon Fiddler had a breakaway and Seidenberg had to haul him down with 2:34 left in regulation. Fiddler was rightly awarded a penalty shot, which he buried past Rask on a backhander, sending the game to overtime, where Dallas carried the play.

Julien dismissed the notion that this loss might have stung more because of who delivered it. His team’s play was enough to anger him.

“It came down to a shootout because we played at the level of the other team,” Julien said. “Not to take anything away from them, but I like to think we’re a better team than what we showed tonight. First 10 minutes were good, and then we got back to some of our old habits and, eventually, when you play that way you find ways to lose hockey games and that’s what we’re doing right now; we’re finding ways to lose. Bad change on the tying goal, real bad change. So it’s not just young guys, it’s good players, it’s everybody right now. So we’re not playing well right now, and we’re finding ways to lose versus finding ways to win.”