It was bad enough that Jarome Iginla didn’t want to play for the Bruins, but on Saturday he helped the Penguins  defeated the B’s, 3-2, at TD Garden.
With Brad Marchand  in the box for roughing, Iginla scored on a slapshot from the point 4:43 into the third period to break a 1-1 tie. The puck went through traffic before zipping past Tuukka Rask’s five-hole. Kris Letang scored on a wrist shot at 8:29 of the third to make it 3-1. Tyler Seguin  scored with 2.6 seconds left to make it a one-goal late, but it was too little, too late.
The win was Pittsburgh’s sixth straight and it allowed the Penguins  (66 points) to sew up the top seed in the Eastern Conference for the season. The Bruins (57 points), meanwhile, are two points behind the Canadiens (59 points) with five games to play. The Canadiens will play the Capitals Saturday night and will have played 45 games to Boston’s 44 by the end of the day.
Brad Marchand  opened the game’s scoring with a power-play goal on a wrist shot that went off Tomas Vokoun and in, but Jussi Jokinen tied the game in the second period by backhanding a rebound past Rask.
The Bruins suffered a pair of injuries in the game, as Nathan Horton  was lost for the game after fighting Iginla in the first period and Adam McQuaid was hurt following a second-period hit from Matt Cooke .
The Bruins will host the Panthers Sunday at 12:30 p.m.
WHAT WENT WRONG FOR THE BRUINS
– Horton was lost for the game after fighting Jarome Iginla in the first period. The fight was very short-lived, with the two power forwards essentially wrestling one another down, but Horton was spotted favoring his left wrist as he left the ice.
– McQuaid left the game and returned, but his situation is still one to keep an eye on. The defenseman jumped up a bit as Cooke went to deliver a clean hip-check and it left McQuaid down on the ice by the Bruins’ bench as he inched his way off. McQuaid was helped down the tunnel by teammates, but he was back on the bench shortly after and returned to the game. He didn’t look like he was 100 percent, however. McQuaid challenged Cooke in the third period and was declined.
– Both of the Penguins’ third-period goals came on the power play. They allowed the Hurricanes to go 2-for-3 on the power play last Saturday and the Sabres were 4-of-6 on the man advantage Wednesday, making Saturday’s contest the third straight game in which the B’s have allowed two power play goals.
– Carl Soderberg didn’t have the strongest showing in his NHL  debut, which was to be expected given that he has played on the bigger ice surfaces in Europe for his entire professional career. Soderberg finished the game with a minus-1 rating (he was on the ice for Jokinen’s goal) and no shots on goal. Soderberg did get some power play time, though nothing came of it as he was not on the unit that yielded Marchand’s goal).
– Zdeno Chara  ended up in the box again for coming to the aid of a teammate, as he was called for roughing when he went after Cooke following the hit on McQuaid. Considering Cooke’s hit was clean, an answer wasn’t necessary. Of course, one can’t blame Chara for seeing his teammate down after a hit from someone with Cooke’s reputation and thinking otherwise.
WHAT WENT RIGHT FOR THE BRUINS
– With the lines in flux (Milan Lucic  was a healthy scratch as Claude Julien  continues to tinker with the lineup), the familiar line of Patrice Bergeron  between Brad Marchand and Tyler Seguin  was as once again strong. Bergeron had a superb showing at the faceoff dot, winning 18 of 26 draws, while the line landed 16 shots on net (six for Seguin and four apiece for Bergeron and Marchand).
– With Horton out, Rich Peverley  took his place on Krejci’s line, as he has in the last two seasons. The trio of Krejci between Gregory Campbell  and Peverley had a strong second period and generated multiple scoring opportunities on a mid-second period shift.