What if Simmons starts practicing like he use to do, and Doc starts to play him. Is there anything preventing Simmons from fouling every time he's on the court and sitting on the bench for fouling out?
He'll be showing up for practice, he'll be available to play games. However, he just has a hard time staying on the court due to foul trouble. Could he be fined for conduct detrimental to the team because of foul trouble? The players union would never stand for that.
The other option is to cough constantly. The team would have to pay him to stay away. I assume he has been vaccinated, so the vaccination excuse may be out the door.