I wonder if the Red Sox should dip into their SP depth, trade a guy like Pomeranz who isn't going to be here next year anyway, and look to improve the 3b defense. They would then move Devers to DH, giving him some work at 1b. They have the depth in the starting rotation to replace Pomeranz.
Maybe Mike Moustakas? That would involve a 3 team trade: Pomeranz going to team X, in turn, team X trades prospects to Royals and Moustakas goes to Boston. Manny Machado would be even better, but the price (in terms of prospects) would probably too high for Boston. Then again, if you move Devers to DH, you are forced to play Martinez in LF, and thus you weaken LF defense. But since Benintendi and Bradley aren't hitting right now, you would improve the offense by adding Moustakas and subtracting Benintendi/Bradley.