Contrary to what you may hear elsewhere, there are plenty of wrestlers that compete with pretty severe knee injuries and some even win with them. I'm not worried about Carter in the least. Maybe Mekhi becomes a little dicey, but maybe not.
We've got a kid at our high school wrestling with a torn ACL right now. Brace it up and go, surgery after the season. Even his future college signed off on it. We've had multiple kids do it at the HS level over the years. A little easier, because they don't have to work as much until the final few matches, but that's pretty much the situation Carter is in as well.
Excuses ARE for wussies, just ask a guy like Nolf. I've got no worries about Carter. He just might not get as much bonus as he would have.