The 6-foot-4, 212-pound native of Charlottetown, Prince Edward Island, was acquired from the Columbus Blue Jackets in 2007 for a fifth-round pick. Following the trade, McQuaid played three seasons in Providence, where he formed relationships with many of his Bruins teammates.
"He's been an incredible teammate for a long time," said Brad Marchand, who played two seasons with McQuaid in Providence and all nine in Boston. "When you look around the room you want guys like him. He's just an incredible guy off the ice, in the room. Great friend. On the ice, he's an incredible teammate. He'll do anything for the team and for each and every player.
"Winning together was an incredible time. We had a lot of fun together in Providence, and we had a lot of fun throughout the years here, and we became very close. We were roommates at one point."
McQuaid's most important assets were his grit and determination - attributes that quickly endeared him to both his teammates and the fans. Never one to shy away from sacrificing his body by stepping in front of a blistering slap shot or dropping the gloves to defend a teammate - even if it meant him missing time with injury - the 31-year-old was the perfect example for Boston's young players.
"I'm so happy, I'm so thankful, blessed to call him a teammate and to have been able to play with him and become friends with him. I learned a lot from him," said Charlie McAvoy. "He's just so selfless, it's insane. It's so refreshing - he'll do anything for you, literally anything. You can lean on Quaider and you know that and he makes that pretty obvious."
Replacing that leadership and toughness will be a challenge, but one Sweeney believes will be embraced by the remaining members of Boston's defense corps.
"We won't know that until we get into the season," said Sweeney. "People talk about being a natural-born leader - I don't know, I think you acquire those skills. Adam's a perfect example of someone who grew into his own abilities and it permeated through the room. I believe those are acquired skills and we will miss that aspect of Adam. I am hopeful that other players will fill that void."
The Bruins were set to enter training camp with eight NHL-caliber defensemen, providing the team with valuable depth on the back end, but also a dilemma for coach Bruce Cassidy.