imo, he's a sunk cost. Barring injury to Shaw, I don't see there being any room for Pablo on the roster. I don't know how his tenure will end, but I don't see the possibility of a successful return to the Red Sox roster. He was never a premier 3B defensively or offensively, so I don't see him winning his job back. He is just not that good. His ceiling for a rebound is not that high under the best of circumstances, and I don't see it as being enough to unseat the incumbent.