I think people are making way too big of a deal of this.
A lot of times there are treatments that can greatly help the issue. There are stretches, massages, splints, orthotic inserts, etc.
Like I said earlier. Even if the foot hurts. A lot of time with plantar fasciitis it’s just pain but you can still do everything at the same level as far as running and cutting and jumping. It just hurts when you do it.
Just give the dude some anti inflammatories and he will likely feel a lot better for games.
It’s probably not a big deal.