It's not a question of if, but when. Devers will play first base and the Red Sox will promote actual hitters to the majors.
Raffy may look clunky at 1B, but who doesn't among Toro, Romy and even Casas? Schwarber did, too, in 2021 -- but getting his bat in the line-up, and keeping JD Martinez at DH almost won a pennant.
The key is to boost the offense, which is just inadequate. Boston, 4-10 in one-run losses, leads the league in one-run losses, tied with the other Sox (the worst team in the history of last year).
Luckily, in the especially-inept AL East, no club is over .500 in one-run games. This division is available... BTW: the two best are KC and Cleveland, both at 8-2.
And don't worry about splits for Mayer or Anthony. Marcelo is batting .256 vs. lefties. Roman is hitting .363. Compare that to Duran .220, Abreu .188, or Rafaela .179 (a RHH) vs. southpaws. Or Story .218 vs. righties (83% of his ABs).
They'll be alright.