Jarome Iginla disappointed Boston again.

One month after choosing a trade to the Pittsburgh Penguins over one to the Boston Bruins, Iginla made sure his first game against the Bruins since leaving Calgary was a victorious one for his new team Saturday afternoon.

Iginla's power-play goal 4:43 into the third period put the Penguins ahead to stay in a 3-2 win against the Bruins at TD Garden.

"It was an emotional game. They came out fired up and played very hard," Iginla said. "It took us a while to match that intensity. But [goaltender Tomas Vokoun] played great, gave us a chance to get going, and as it went on I thought we got better as a team. It was nice, I thought, in the third [period] there to be able to get some power-play goals because they were playing it pretty tight."

The game was played Saturday after it was postponed Friday due to the manhunt for a suspect in the Boston Marathon bombing.

Pittsburgh, which has won its past six visits to TD Garden and six in a row overall, clinched the top seed in the Eastern Conference. The Penguins again played without injured Sidney Crosby, Evgeni Malkin, James Neal and Paul Martin, who have missed varying amounts of time in the past month.

But Pittsburgh locked up first place with four games remaining.

"For whatever reason, we just kept pushing through, kept finding ways to win," defenseman Brooks Orpik said. "It's a little unique, I guess. The 82-game season, it seemed like the last couple of years it always came down to the last day. It's definitely a little bit different for us."

Late last month, the Calgary Flames made a deal with the Bruins to send Iginla to Boston, but Iginla invoked his no-trade clause and the Flames then made a deal with the Penguins. Iginla made the Bruins regret how things went down even more when he released a slap shot from the blue line that eluded Tuukka Rask through the five-hole early in the third period. Brad Marchand had just been called for roughing after he tried to get Jussi Jokinen to fight.

Boston fans booed Iginla every time he touched the puck.

"No, I wasn't surprised," he said. "It's a great sports city, and at the time I was very humbled that I had an opportunity to go to both teams, both teams were interested in me. I made the choice to come to [Pittsburgh], I'm thrilled with that. But I have a lot respect for the city here, I hear great things from the guys that play here, I have some friends on that team. I hear great things from the city, the organization.

"I expected that (the booing), and it's not too bad when it's on the road. When it's on the road, you can live with that. At home, when you're getting booed like that, it's hard to take."

Pittsburgh defenseman Kris Letang scored a power-play goal at 8:29 of the third period to give the Penguins a 3-1 lead. Vokoun stopped 38 shots.