Ketel Marte: Frustration from His Boss

What’s going on with Ketel Marte?
The player, who was shopped around last winter because he wasn't willing to give his all to help his team reach the next level, recently left his team.
He didn't show up at Fenway Park, was placed on the restricted list, and his manager seemed emotional when discussing his situation (described as personal) with the media.
Since then? He's returned to Arizona to undergo tests on his knee and has been placed on the injured list.
But that doesn't seem to be t