Yeah, I don't think any doctor directly addressed him playing again, but I think there was a quote to the effect that best case scenario was he would be back to who he was prior to Monday.
To be clear, I'm not suggesting he will or should come back or the Bills or any other team would assume 'the risk'. But if it was a freak accident as some reports suggest then the risk any team would assume would be no different than the risk of putting any player in the same situation.