Unironically, if they could get JT Miller for a decent price and convince Toews to come in as a 3C they'd be in really good shape. Put one of Zacha/Coyle at 2C and use the other as a winger or injury replacement C and they're set
Toews retired, I think?
Aside from debating whether JT Miller is the RIGHT center to come in, logistically the following would need to be worked out. This would apply to any center coming back.
Cap needs to work going both ways, Bruins currently have 429k of cap space with a 22 man roster.
Likely candidates:
Combination of the following:
Charlie Coyle 5.25M x 3
Jake Debrusk 4M x 1
Brandon Carlo 4.1M x 4
Matt Gryzelcyk 3.6M x 1
Derek Forbort 3M x1
Jakub Zboril 1.1M x 1
Obviously some of those guys on that list hold more value than others. But ideally any deal where the Bruins can ice a 23 man roster without cap gymnastics the better.
JT Miller 8M x 7 currently has an NMC, Bruins likely would be able to move an LD (Gryz or Forbort) as at least one of the players. But that's an awful long contract if he's not the guy they want.
Not advocating for Miller, but those are likely players with salary that could be moved. Miller has term, so I doubt retention is realistic. Whether or not JT Miller is the guy the Bruins want long term, that's very debatable, but open to exploring options.