Sirott, the Bruins radio play-by-play announcer for the past seven seasons, takes over after Edwards stepped away after 19 seasons.

Zadorov, signed a six-year deal with the Bruins, brings physicality and swagger.

Swayman, the top goalie in Boston after Linus Ullmark was traded to Ottawa, went through arbitration last year and said, ‘I don’t want to do it ever again.’

Dean Letourneau will play for Boston College next winter, but the 6-foot-7 center got a good taste of playing at the top level.

Signed out of Providence College in the spring, Duran got his first taste at the pro level with the Providence Bruins.

Matt Poitras, a surprise contributor for Boston last season, which was cut short by a shoulder injury that required surgery.

Commentary: Boston picked up the best center available, but still has work to do with the bottom six forwards and a long-term plan for a backup goalie.

Just watching Nikita Zadorov – at 6-foot-6 and 248 pounds – will sell most Bruins fans on the free-agent defenseman.

Boston shores up the middle of the ice, but still has to reach a deal with goalie Jeremy Swayman.

Dean Letourneau is expected to spend at least one season at Boston College, where he’ll face a much higher level after dominating opponents at his Ontario prep school.