One more time even though no one is listening. The Sox don't need a great first baseman to replace Casas.
In fact, a lousy one will do. Sogard has played two games at 1b and the Sox won both of them.
How many times do I have to remind you people that Casas was a liability this season? He had a WAR of -0.8. Replacing him is the easiest thing in the world.
So why look further than Romy Gonzalez (now on the IL)? His WAR is +0.4, a huge improvement over Casas. So is his OPS, .785 to Casas' .580. Heck, Connor Wong played 1b a few times last season.
If the Sox could find a pretty good firstbaseman at a reasonable price, I'd be for it. But they can't. Heck, I'd even move Story to 1b and move Mayer up to Boston.
Right now Devers is hitting well, and I think part of that is being a full-time DH.