The only hope is that he is so embarrassed by his play and unhappy playing baseball that he is open to negotiating some type of buyout and even then I doubt we would recoup a large percentage of the money that he is owed. Other than that we have no leverage. If he's content on riding out the contract and just showing up to collect a paycheck, I doubt he cares if he isn't playing. In fact, he has to expect that at this point that his playing time is going to shrink considerably going into 2019 and beyond.
I think he will be DFA at some point in the 2019 season without a buyout being negotiated. They'll give him one last chance to see if he can turn it around even though the chances of that happening are slim to none.
Understatement of the year.
You'd be hard pressed to find any Triple A player who is not better than Davis right now. In fact, I really don't think Davis could even hit Triple A or Double A pitching at this point.