How unlikely? Are you a doctor? It was the same last year with Mario's wrist. Then he had Surgery and started playing better. We have no access to the information. None. maybe its not just PF, maybe he has nerve damage like McGee did, or perhaps something else. Teams don't give out all the information, and for good reason. I'm sure you'd be perfectly ok with posting your medical records here?
When Gilmore got hurt people said he could play with a broken wrist, til they saw the picture of pins sticking out of his wrist.