The Bruins now have a small sample size of what life will be like without Dennis Seidenberg and it looks like they might need some help. The Bruins lost for the third time in five games since Seidenberg was lost for the season with a torn ACL/MCL in his right knee. Word on Tuesday that his surgery was successful gave little solace to his team. Instead, they were looking at a Bruins penalty kill that’s allowed a staggering seven power-play goals in 17 opportunities since Seidenberg got hurt, and allowed 14 goals in those aforementioned five games. The 2.8 goals allowed per game without Seidenberg is nearly an entire goal per game different from the 2.1 goals allowed per game the second-ranked Bruins defense has averaged all season. Clearly, there are other things at work aside from the absence of their stalwart German defenseman. Tuukka Rask has allowed five goals in a game twice the past five games after doing it just once the first three months of the season, and has been outplayed by Evgeni Nabokov and Jonas Hiller in the past week. The hope is the Bruins can get through the regular season with Seidenberg out and there is plenty of young defensemen depth in the organization. Still, Adam McQuaid struggled mightily while filling Seidenberg’s role on the penalty kill on Tuesday night while on ice for three Ducks power play goals. Dougie Hamilton has done reasonably well skating alongside Zdeno Chara in the top D-pairing, but there’s been a real drop-off when Chara steps off the ice for the necessary breather. That was always Seidenberg’s underrated job: to hop on when Chara was on the bench – especially on the penalty kill, and right after the end of a power play – and stabilize things if the puck was in the defensive zone. Now the Bruins look like they’re missing one of their vital defensive appendages, and it’s becoming increasingly clear they need a little help in the trade market. It’s doubtful B’s general manager Peter Chiarelli will strike for a panic deal because the trouble signs are there for the Black and Gold. The prices are sky high little more than two months before the NHL trade deadline, but the B’s also clearly need some help outside the organization prior to the March 5 deadline.