When the Bruins open up the Playoffs on Thursday night at TD Garden, they could be doing so with up to six rookies on the roster, four of which have never played in the postseason. And it's the contributions of youngsters like Jake DeBrusk, Ryan Donato, Danton Heinen, and Matt Grzlecyk, as well as "seasoned" playoff heroes Charlie McAvoy and Sean Kuraly - combined with the play of Boston's championship core - that have helped propel the Bruins into contending status.
"Those young players deserve a lot of credit for moving along and developing accordingly," said Sweeney. "They got opportunity - we spoke at the beginning of the year that players would get opportunity. It was up to them to take advantage of it, and I think several of those players have done that, and we've benefitted as an organization as a result of that.
"But I've always said all along, I think the core group of our players are the driving influence there, and then we have players that are emerging to hopefully grow into the next core."
For those in that group that have never suited up for a game in the Stanley Cup Playoffs, it will be a learning experience - but one Sweeney reiterated will be about one thing and one thing only.
"This is winning. This is all about winning. It has [been] from day one," said Sweeney. "That's how you're judged and surveyed this time of year even more so. We talked about [David] Pastrnak last year going through the playoffs for the first time. Yeah, some players are going to go through that. It's about winning."
And that's why the Bruins went full boar through the final month-plus of the regular season, which saw them play 21 games over the final 39 days. While the cushion they built in the standings may have provided Boston with an opportunity to rest some of its lineup, the Black & Gold pushed for the top seed until the Game 82 - and as a result, the touches of mental and physical fatigue that set in over that grueling stretch were, perhaps, contributing factors to the team's recent struggles.
"We always felt March was the daunting part of the schedule, unfortunately," said Sweeney. "We were in a pretty good position, but we were still pushing forward. That's the type of team that we had. They wanted to win. We had the chance right up until the final bell to try keep climbing the standings and meet every challenge. We fell short in that regard, but I think they're ready to look forward and hopefully they'll play their best hockey, because that's what it's going to take."