Try to fix him in the offseason then make him earn it
This is the evenest decision the Mets can make. Remove him from the closer role now then attempt to fix him in the offseason. Make the man earn back his closer role if it’s something he wants badly enough. With possible large payday in his near future, there’s more motivation than just bragging rights.
The biggest obstacle with this is how the Mets fix him. If they had the magic wand to do so, it would have happened already.
An “easier said than done” plan like this is logical and is the approach I would take with the young closer. The Mets put themselves in a position to please the most people—although this shouldn’t be the goal.
What the Mets need to aim for is to get the best out of Diaz as they can during his time in New York. Right now, he is incapable of giving them his best effort. This is why I don’t want to see him pitching in the ninth inning for the rest of the year.
Maybe someone is capable of fixing the enigmatic lost year for Diaz. During the offseason, this should become a major priority for the ball club.
Other than this, there is only one other option for the Mets I haven’t yet mention. It’s the one where Brodie Van Wagenen admits the trade with the Mariners was a disaster that keeps him awake at night. He did so before (to a lesser extent) with other players. Could we actually see BVW do the unthinkable and actually try to take back what looks like a historic mistake?