Are the Boston Bruins Dr. Jekyll or Mr. Hyde?

Are they a good team with clear shortcomings on the defensive side that sometimes make them look worse than they are, or a mediocre team that is able to pound opponents so decisively on occasion so as to fool the optimists out there who support them?

The answer just might represent a little of both.

On Wednesday night, the B’s completed a three-game series sweep against the Pittsburgh Penguins, which is a similar team in that it has been a perennial contender since the Sidney Crosby era revitalized the team’s fortunes, but this year has been a shadow of its former powerful self since squeaking into the playoffs at Boston’s expense last spring.

Like Boston, the Pens have a powerful 1-2 punch at center (though Evgeni Malkin was unable to return from injury to help his team at the TD Center last night), a leaky defense made up of game, but  often overmatched 4/5/6 types and a goaltender who can minimize the damage but can’t do it all himself in Marc-Andre Fleury.

As was the case in Dallas last Saturday, the B’s didn’t exactly dominate the contest, as the Penguins came at them early, hemming them in their zone. Tuukka Rask withstood a 13-shot opening period, not allowing any pucks by him, and David Pastrnak scored the third penalty shot goal of the season for Boston to make it a 1-0 contest.

Pastrnak (his eighth) and Penguins forward Tom Kuhnackl traded goals in the second period to set the stage for a critical third period with the B’s still smarting after getting zinged at home the other night against Columbus.

Jimmy Hayes, Landon Ferraro and Brad Marchand, who scored his team-leading 31st goal, tallied three goals on three shots in the final 10 minutes to push the score to 5-1 and give the Bruins a much-needed home victory.

Hayes finished off a brilliant rush by Ryan Spooner, who got the puck from Hayes after Adam McQuaid blocked a shot (after losing his helmet- no fear) and took off like a rocket up the ice, crossing with Matt Beleskey at the offensive blue line to gain extra space. He then approached the net from the left side and threaded a pass right to Hayes, who didn’t miss for his 13th marker.

Ferraro then broke away after slipping behind the defense and getting a home run pass from Dennis Seidenberg, beating Fleury with a top-shelf laser for just his fourth goal of the season. Ferraro also had an earlier fight with Scott Wilson and gave better than he got, showing off the kind of energy that has made him a capable bottom-line player since the B’s snatched him off the waiver wire from Detroit.

Marchand’s final tally was vintage No. 63, as he got the puck from Torey Krug, cut to the net and let a jumpy Fleury make the first move before going around the defender and sprawling goaltender to slip the puck in on the far side.

Rask, for his part, was magnificent in a 41-save effort- he gave up just the Kuhnackl goal, scored off the German forward’s skate after a fat rebound. This is the kind of game that the Bruins typically need from their one-time Vezina Trophy-winning netminder. The defense still gives up a good number of quality scoring chances, but when Rask is on top of his crease and in the zone, he’s as good as anyone else in the league. The problem is- when the B’s go up against clubs with better top-to-bottom roster depth, they have a tough time matching up against teams that have the speed and skill to employ an effective forecheck that disrupts Boston’s timing on the breakout and leads to defensive zone turnovers.

Pastrnak’s performance gives the team multiple reasons for optimism. For one thing, it’s been a tough slog for the 19-year-old, who burst onto the scene a little over a year ago when he was called up in January and then proceeded to become Boston’s brightest hope for the future. Beyond his obvious offensive talent, Pastrnak is an easy kid to get behind because he wears his love of hockey openly, with a wide, infectious smile that reminds everyone who watches him of how all of these pro players began their lifetime association with this sport. Pastrnak is also serious and hard-working. He’s not quite on the same level as Patrice Bergeron was at the same age, but he’s not that far off, either. Pastrnak made the NHL at 18 because he not only gave the Bruins something they desperately lacked, but also because the coaches saw his work ethic and desire to improve manifested at practice. Some people have to be taught by others how to work harder to maximize their natural gifts, but Pastrnak needed no such coaching, and was often the last player off the ice (and still is). Claude Julien and his veteran coaching staff saw that, and so even with the setbacks the second-year right wing has dealt with this season, they’re willing to stick with him and maintain the faith that he can become the regular scorer he’s shown the penchant for in flashes.

Where do we go from here?

The Loui Eriksson trade watch continues, and I’ve been intrigued by the polarized sides on Twitter and the Internet- the two camps that are clearly at odds with one another within the B’s fandom. I explained at length last week why the Bruins will trade Eriksson and try to leverage him into the assets that can allow GM Don Sweeney to more properly address the elephant in the room: the defense.

Although there seems to be a group of folks who believe Eriksson can and should be signed, I have yet to see any plausible explanation from that side on how it will work. Assuming his agent JP Barry wants to secure money and term from his client (and why wouldn’t he?), the Bruins would essentially be rolling the dice that the soon-to-be 31-year-old would be able to maintain his current level of contributions for another four years at least to make an extension worthwhile. While that’s not impossible, the odds are certainly not in favor of that. Eriksson has never been a dynamic skater, so if he loses a step over the next couple of years as many players on the wrong side of 30 tend to do, his production could essentially drop off a cliff. The B’s cannot afford to be shortsighted here- that thinking is what got them into salary cap jeopardy in the first place.

Loui is a fine man and teammate. In a perfect world, we wouldn’t be having this conversation, and in the scope of the here and now, he obviously makes the Bruins a better team than they will be without him. But fans demand that their teams be in the winning mix year after year, and extending Eriksson puts that philosophy in peril. Sure- he’s one of the team’s most versatile and dependable forwards, but one can also make the argument that there are young players in the system that can capably address what Eriksson brings to the club given a little time. They won’t cost upwards of 5.5-6 million dollars a year (at least not right away) and dealing Eriksson gives the Bruins the much-needed coin of the realm: assets in the form of picks and futures that every team covets to off-set the ever escalating salary structures needed to retain the top talent across the league.

Should the B’s prove me wrong and hold onto Eriksson, either extending him or keeping him for the playoffs, we’ll revisit the implications of that when the time comes. Even if he’s not moved at the deadline, they can still flip him to a team that wants his exclusive negotiating rights before the July 1 free-for-all for a middling pick, which is not ideal but better than nothing. If they commit the term and dollars to him, then I think it works in the short run, but could have profound consequences by the years 2018 or 2019. I guess for those who like to live in the now, that may not be such a bad thing.

What we’re figuring out here is that making trades and acquiring the kinds of essential players needed to assemble a winning mix in the modern NHL is easy to talk about, much harder to pull off. It isn’t like Boston is bereft of young defensemen in the organization, but nobody is truly ready to step in and make the kind of difference this team needs right now with a goalie in his prime along with multiple forwards whose window might be closing by the time the B’s home grown blue line talent can make an impact.

Colin Miller has shown he can create offense, but he’s still got much to learn defensively. Rob O’Gara is having a down senior year at Yale but has size and mobility to become a bottom pairing staple after a little seasoning in the AHL. Matt Grzelcyk has the speed and offensive talent to be a two-way threat, but like Krug, will need some time to develop in the minors and will be a wild card in terms of what kind of role he can carve out for himself in Boston. Jakub Zboril, Brandon Carlo and Jeremy Lauzon were all drafted last June and are not realistic options to make a difference for at least another full season but likely two or three more years at the earliest.

That means Sweeney needs to add a key piece now or at least in the coming off season. You have to give to get, and Eriksson represents the kind of asset that can increase the GM’s options, not diminish them. Yes, fans may not be thrilled with the kind of return he brings back in a few days (assuming he’s dealt), but you have to play the long game here and realize that a trade made today could set up the even bigger haul tomorrow (or in about three or four months).

If we’ve learned anything about the recent wins over Dallas and Pittsburgh, it is this- the scores didn’t represent how close the games actually were. The B’s benefited from shaky goaltending play from their opponents, but in the playoffs, when every game’s intensity is ratcheted up a few notches and the better teams can make you pay for every mistake, this Boston club isn’t going anywhere far as currently constructed.

That means you have to live with the tough calls and some short-term disappointment in order to benefit from a potential sustained run of excellence. Ask Columbus fans how much fun it has been to cheer for a team that has always tended to fiddle around the margins rather than make bold decisions to build for the long term and you’re not going to like the answer. Teams like Edmonton and Columbus should serve as a reminder that picking at the bottom of the draft every year is no sure path to contention. The Bruins have the pieces to be a contender, but the team has to be smart about how they streamline the effort.

Making decisions based on emotion, loyalty and what someone did in the past versus what they will do is more of a recipe for failure than success. When it becomes time to come to grips with the fact that Bergeron, Krejci, Rask and Marchand can no longer do what Boston fans have enjoyed and come to expect for so long now, the team cannot afford to have multiple albatross contracts around the neck.

Digging out from that kind of hole could take years.