A ruptured plantar fascia (simplistically the ligaments/tendons that connect your toes to your heel) is not a common injury, generally it happens to people with flat feet deformity. Basketballers are also likely sufferers. Like anything foot related it takes a long time (months) to heel and requires rest during recovery. To keep playing would require pain killers, strapping and foot support (orthotics) in the footy boots. Surgery isn't commonly required, unless there is a heel spur which requires surgical removal of the bone spur. I wouldn't be surprised if he isn't doing much training, to give it a better chance to heel, maybe upper body only.
From memory this is our 3rd foot recent related stress injury, RFM (bone fractures), Thompson (lisfranc) and now King. All different parts of the foot though. Is there a common factor at work here?
Always a Bulldog