The Sox just need to go out and get Castellanos. Mazara can play RF against right handers, while Castellanos is at DH. Castellanos can play RF against lefties with McCann at DH. It makes so much sense which is why they won’t do it.
I just don’t see the upside with this move at all. Even if you think Mazara will improve, he only has 2 more years of control left and is represented by Boras. So what’s the point?