Bregman may be gone, and that opens a clear spot for Mayer at 3B, SS (move Story) or 2B (move Campbell.)
Refsnyder may retire, so that allows Rafaela to platoon with Abreu (or Duran) and open up LF for Anthony- not that Ref is blocking Anthony, now: Rafaela & Duran are.
DH might be open, if they convince Devers to play 1B, or 1B could be open to Campbell, which allows Mayer to play middle infield.
A lot can happen, including a trade of Mayer or Anthony, or more likely, an established player like Story, Duran, Rafaela or Abreu.