I doubt it, but, if true, there are better ways to accomplish that. Like season ending “surgery”. If he’s out there throwing games, Vegas and the NBA would have an issue with it.
Honestly, if the Kings want to win, start Mitchell. Turn Fox into a 6th man. Or trade him, The spacing and ball movement sucks with Fox dominating the ball—even on the good plays, it’s mostly Fox dribbling. And they leak too many points on defense, because of a lack of a point of attack defender.