Zdeno Chara returns for his tenth season as the captain of the Boston Bruins (photo courtesy of Alison M. Foley)

In retrospect: It was a rough ride for the Boston D party in 2014-15, as former GM Peter Chiarelli traded glue guy Johnny Boychuk on the eve of the new season, a move that went on to have significant second- and third-order effects on a roster ravaged by injuries to  Zdeno Chara, Adam McQuaid and Kevan Miller. Adding to the struggles was the lackluster performance of Dennis Seidenberg, who returned from a major knee injury suffered in 2013-14, but was not the effective, shutdown presence for Boston he had been previously.

The Bruins allowed 30 more goals last season than the year before, and the lack of collective team foot speed often found them susceptible to being beaten off the rush and often collapsing into their own end while struggling to generate a transition to offense the other way. Torey Krug was a bright spot for the club, finishing second on the blue line in scoring with 12 goals and 39 points. The team’s offensive leader, Dougie Hamilton, was traded to Calgary on the day of the 2015 NHL draft in a rapidly developing (and shocking) move that sent the 22-year-old out West and left a sizable hole on the Boston depth chart that the team has yet to fill.

Younger guys like Zach Trotman and Joe Morrow showed promise in flashes, but ultimately, the disappointing non-playoff 96-point finish was reflected in a defense that lost a major on- and off-ice contributor in Boychuk and never really got a healthy Chara going for the duration, as he returned to action after missing nearly two months at well less than 100 percent.

The view from here: Chara remains the face of the franchise on the blue line, though he is past his prime at age 38 and is coming off his lowest production (8 goals, 20 points in 63 games) since the 2001-02 campaign, his first as an Ottawa Senator. He faces the prospect of playing the rest of his NHL career on a wonky knee, which essentially makes him day-to-day for life, and means that the B’s must be prepared to lose him to injury at any time.

Chara is the consummate pro and veteran, but his injury complicates the often armchair GM discussion of the team simply trading him. Even at his age and declining offensive numbers, Chara is more valuable to the Bruins than he is to other teams that might be in the position to trade for his $7 million salary (he’s signed for two more seasons- at $5M and $4M respectively before becoming an unrestricted free agent again in 2018), simply because with Hamilton out in Boston, the B’s don’t have any other legitimate player to thrust into the top role today. The onus is now on Claude Julien the Boston coaching staff to better manage Chara’s ice time and game situations to get the most of his experience and 6-9 frame with the lengthy reach. His best days are clearly behind him, but it’s not quite so simple to sit back and talk about trading Chara for cap relief and a younger talent- you’d not only need a willing buyer to give up a roster player worthy of the move, but Boston’s captain would have to waive his no-trade to go. It’s not unthinkable to consider it, but the likelihood of it happening is slim- the Bruins need Chara this year more than ever.

The team can only hope Seidenberg can rebound from as brutal a year as he’s had in his career. His struggles underscored the fact that literally days after signing his four year, $4M per extension with the B’s he suffered his knee injury and the very real possibility exists that at age 34, he’ll never get back to the player who was so instrumental in one Stanley Cup championship and a second trip to the finals in three seasons. The German has given a lot to the Bruins, but his contract, only in its second year, looms like an albatross around the team’s collective neck if he is unable to round back into form. The analytics from last season do not paint a pretty picture, however, and things may get worse before they improve.

Krug is preparing for an expanded role given Hamilton’s departure, and the B’s could greatly benefit from him taking his offensive production to the next level to help offset the loss of their former 2011 top choice’s numbers, especially on the power play. At 24, the diminutive Michigander has the heart of a lion and is embracing the challenges that await him with increased minutes at even strength, but like Chara, the team will have to manage the matchups when he’s defending against the NHL’s bigger, powerful forwards and live with the higher-risk style Krug employs when carrying the puck on his own. Krug has enough talent, hockey sense and an off-the-charts work ethic/character to compensate for his undersized frame, and the belief here is that he’s going to make it work.

The team raised eyebrows when it re-upped Adam McQuaid, the club’s resident baggage-smasher at 6-5, 210 pounds. Another quality person and teammate, McQuaid has overcome a lack of foot speed with a tenacious, pay-for-every-inch-of-real-estate approach that has served him well. When it comes to toughness, no one on the current roster can bring it better than the former Sudbury Wolf can, but he’s a pretty one-dimensional shutdown defender. One of the biggest issues with McQuaid is in his struggles to stay healthy and play a complete 82-game schedule over the course of his career. Since breaking into the NHL full-time in 2010-11, he’s never played more than 72 games, and appeared in just 93 contests over the last two seasons. If how honest, dedicated and hard-working a player was all you needed, McQuaid would be worth every cent of the 4-year, $11 million contract he signed this offseason. As it stands, the Bruins can only hope he can reverse past trends and become a durable presence. Even if he does, the debate will rage on as to how wise an investment it is for a rock-solid third-pairing defenseman.

Veteran Kevan Miller played 41 games last year before being lost to season-ending shoulder surgery. He’s a similar player to McQuaid, but at a substantially less cap hit of around $800k. A gritty, character undrafted free agent who worked his way to the NHL after captaining the University of Vermont Catamounts, Miller’s mobility and experience stand him in good stead heading into the new season, but there isn’t much in the way of offense from him.

The B’s signed free agent Matt Irwin to add to the mix from the San Jose Sharks. The 27-year-old played about 17 minutes (you’ll hear the sheltered minutes argument with both he and Krug) with the bulk of his 8 goals and 19 points coming at even strength last season. He doesn’t bring a lot of pure foot speed with him to Boston, but he’s not a substandard skater either. Irwin has NHL experience and has shown promise as a two-way contributor- he’s third on the blueline behind Krug and Chara in scoring from last season.

This leaves a trio of younger defenders with the two-way potential that Boston desperately needs, two of whom spent some time with the big club a year ago in Zach Trotman and Joe Morrow. Trotman is bigger than Morrow, but does not have the former 2011 first-round pick’s speed or puck skills. Both can hammer the puck from the point and move it effectively, but of the two, Morrow is more of the offensive threat and special teams presence, whereas Trotman is a little safer and more polished defensively. Both will battle it out for a sixth position in the regular rotation if you believe that Miller or Irwin could end up being the seventh defender. Trotman was the last pick of the 2010 draft out of Lake Superior State, and Morrow’s been a disappointment as a pro after leaving the Portland Winterhawks. He was traded to Dallas from Pittsburgh and just a few months later, flipped over to the Bruins in the Tyler Seguin trade. Given what we’ve seen from Loui Eriksson, Morrow (and Jimmy Hayes to be fair) is the last best hope the team has in getting a long-term return on that deal.

As for Colin Miller, the AHL’s reigning champ in the hardest shot and faster skater competition at the 2015 All-Star Game doesn’t have NHL experience, but he has the offensive skill set to see time and even win himself a full-time role with Boston this year. This is a huge camp for him, but at 23, it won’t be the end of the world if he’s not on Boston’s opening night roster, but given that he was part of the Milan Lucic deal, if he earns a spot, the B’s will gladly take it.

A Dennis Seidenberg rebound could be an important factor in a Boston return to the playoffs (Photo courtesy of Alison M. Foley)

On the farm: Boston’s first pick in 2013, Linus Arnesson, will be playing in his first complete AHL season. The late second-rounder has good size and mobility, but he’s more of a no-frills, solid defensive presence than he is a player who will push the pace, join the rush and contribute consistent offense for his team. If he’s in the Boston lineup next year, then something has likely gone terribly wrong in terms of injuries and/or performance. Arnesson is steady and consistent, but he’s not going to wow you in any one facet of his game. Every good team needs players like him to win with, but he’s not going to be a savior.

Chris Breen is back for a second year in Boston’s system and at 6-7, 224 he certainly provides the size and reach for a defensive-minded defender.  He has some limited NHL experience and doesn’t move his feet all that well, but will be another key contributor in Providence and can help in a pinch.

Gone is David Warsofsky, but fellow New Englander Tommy Cross is back for another tour of duty in Boston’s system with Providence. If only that’s all it took to be an NHL regular… Cross is the very last piece remaining from that disastrous draft year and he’s ticketed for the AHL once again, where he could see an injury recall at some point as a reward for his hard work, but in all reality, the one-time Boston College captain will be fortunate to ever establish himself as a bottom-pairing player at the NHL level.

Chris Casto is underrated, and as a free agent signing out of University of Minnesota-Duluth back in 2013, he looked as if he might have the size and wheels to develop into a solid NHL defender, but it just hasn’t happened for him in the AHL. Nobody ever talks about him, but he’s a fluid skater with a big shot, who has at times struggled with processing the game and pace. He’s got one more year on his ELC to raise his profile in the organization.

A look to the future: The B’s drafted three defensemen in the first two rounds this past June, all of whom bring much needed skating and size to the mix. Jakub Zboril and Jeremy Lauzon are the ones the team hopes will be more complete two-way defenders who can help kickstart the attack, whereas Brandon Carlo is a huge (6-5) and mobile rearguard who is a better shutdown guy than offensive producer. All three look like players, but won’t likely help out in the short term (though with all three being products of major junior- they’ll at least be at training camp and one could pull a surprise- it’s happened before).

One player who has a shorter wait to making an impact in Boston as early as next spring is Yale senior Rob O’Gara. The fifth-rounder in 2011 has patiently and steadily progressed in the system, winning championships at both the prep (2011) and NCAA (2013) while developing his two-way game. At 6-4, he has a rangy stride and fluid footwork and pivots. He started out being a top shutdown defender, even earning that honor this season in the ECAC. He also improved his offensive production in his junior year, leading the Bulldogs’ blue line in scoring. He’s a smart, industrious 22-year-old who is expected to sign at the conclusion of Yale’s season and who knows? He might even get a quick look in Boston depending on how the defense is situated by then. If not, watch for him to help Providence down the stretch if he’s not still in school finishing up his course work.

Matt Grzelcyk is another prospect worth watching this year. The BU senior and captain is on the shelf for a while after May knee surgery, but he’s expected to be a major contributor to the Terriers’ fortunes again after posting career bests in all offensive categories a year ago. He’s undersized but brings excellent speed, vision and skill to the mix. Watch for him and O’Gara to push one another as complementary players to one another going forward. At the very least- they’ll be helping Providence in the AHL until they can push for time in Boston.

On the longer track, collegians Matt Benning and Wiley Sherman still have time in the NCAA to hone their respective games (Sherman is still a major project just entering his sophomore year at Harvard) while Swedish defender Emil Johansson will spend another season at least in HV71 before he might come over.

The wild card: Cody Franson, D. We know that Franson and Don Sweeney have both admitted that the two sides have talked contract, with Franson reportedly holding out for value and longer term than Boston is willing to give. With about $4M in available cap space, Sweeney wants to preserve as much flexibility, and as we get closer to September, Franson may have to come off plan A in favor of incentives and a chance to prove himself this season for a bigger payday next July. On the upside- Franson is an experienced NHL veteran who will help offensively and especially on the power play with his booming point shot and ability to distribute the puck. One thoughtful Twitter follower I engaged in a debate today over Franson pointed out that in Nashville after the winter trade, Franson was on the ice for just 9 even strength goals against and that he accounted for 56% of shots attempted from the blue line- good for the lead among all Predators defensemen. On the downside, he’s not a swift skater for a club in major need of getting faster and his hockey IQ at times lends itself to him running around and making bad turnovers in his own end. There is no doubt he’d make the Bruins defense better than it is today, but how much and at what cost is a question Don Sweeney has to answer. One shoe dropped today with Christian Ehrhoff agreeing with the Los Angeles Kings to a team-friendly 1-year pact at $1.5 million. If Franson’s price tag is expected to go down as he gets closer to the start of NHL camps, then other teams are likely to start sniffing around. Something’s gotta give here.

The wild card pt 2: Maxim Chudinov, D SKA St Petersburg. The KHL champ is getting ready for another year in Russia after the Bruins made him the 195th overall pick in 2010 as an undersized but speedy and feisty offensive player. Truth in lending- I don’t think Chudinov adds much more than what the Bruins already have in Krug, though he’s faster on his skates (but in my view lacks Krug’s leadership and heart). If the Bruins want to add him to the mix, that’s a call they’ll have to make and information is out there (h/t Dominic Tiano) via Chudinov’s agent that the 25-year-old is willing to give the NHL a shot. I guess we’ll see, and you can never have too much depth, but it’s hard to imagine that he’d want to sign and play in Providence, so it would have to be a similar situation to Carl Soderberg a few years back.

Adam McQuaid was extended four years in June (Photo courtesy of Alison M. Foley)

The verdict: I have to call it like I see it and this defense as a whole doesn’t scare many (except for perhaps some Bruins fans).

Team speed, which was the biggest need in the offseason, was addressed in the draft, but those kids won’t help this year unless the B’s luck out with another David Pastrnak-type situation. They’ll get faster with Morrow or Miller added to the mix, but the team will still have their hands full trying to generate an attack through the neutral zone or standing up opponents who can push the pace of a game.

The time has come to actively manage Chara’s role and put some constraints on what is asked of him. He’s got a lot of tread on the tire, and it’s time for others to step up and take some of the pressure off. I don’t know how much longer that troublesome knee and his huge frame will hold up. Forget trading him for now- Boston needs him and if things change (especially if he decides he’d like a change of scenery) then that can be revisited. In all reality, unless Chara wants out, it’s hard to imagine the Bruins trading their captain and getting anywhere near close to the value that would make such a move worth it.

Krug is the one player who appears primed for an important role this season. It’s a chance for him to answer questions about his ability to play upwards of 21 minutes or more a night, against top opponents and continue to carry the offensive mail for this team. Mistakes are bound to happen, but how much Julien trusts him going forward will be something to watch. Krug loves playing with McQuaid…will the two stay together or will the team break them up and try something else?

Whether the team adds Franson or goes with 1 or more of the youngsters in Trotman, Morrow and Miller- the Boston defense is not going to be much of a threat offensively, so they’ll have to take care of things in their own end. Without the requisite speed and ability to contain speed to the outside, that’s going to be a challenge.

It’s a game and gritty group- but there are a lot of if’s heading into the new season. That means the goaltending and the forwards are going to have to pick up the slack.