With how they are handing out medical redshirts now, gone are the days of 'Well you never know if he will get hurt and need it later.'
That makes me say to Redshirt him. Even though you lose three seniors at the end of this season to graduation - maybe four depending on if Matthews utilizes his free 'rona year. Pitzer isn't going to win more than one match at NCAAs. That is probably Slinger's cap, too.
Give him the season. Let him physically, emotionally, and academically mature this season because his peak is probably only a match or two next season as well. Heavyweight is very deep right now.