Hayes has been great defending opposing bigs in the post. So strong, low gravity point, laterally quick, smart, can't challenge many shots but puts a hand in the face. He's the best post up defender on this team.
He's generally been very good defending PnR as well.
He just can't protect the rim. The best he can do is hand in the face or take a charge.
I'm actually starting to wonder if Chuck will become Casey's go-to center vs. every good offensive post player. Playoffs vs. Charlotte, who plays more minutes, Chuck or Jonas. Jonas has far more offensive value, but if he's not having a great offensive night, it will be tough for Casey to keep him on the floor.