I kinda agree that Darrisaw should just fully heal at this point but it's probably not quite that simple. I don't know but suspect he has certain incentives in his contract so playing more gets him more money. He's also probably incredibly competitive and doesn't want to sit. And football teams tend to reward and nurture that kind of thinking - even forward thinking orgs like the Vikings - so he has the football culture to keep him on the field as well. I'm sure his line coach is whispering in his ear, "man, JJ's finally coming around, we want you protecting his backside so he can keep developing. You're the man."