It's no secret that RB Adrian Peterson is eager to get back as soon as possible, but the Vikings doctors and athletic trainers are intent on making sure he doesn't come back too soon and suffer a setback.
The Vikings main worry is the 27-year-old Peterson returns to his previous form and not that he attempts to come back too quick.
Reading between the lines, it seems like the Vikings' plan right now might be to open camp with Peterson on the physically unable to perform list. That move would make him ineligible to practice and not open the door for Peterson to talk his way onto the field.
No RB has returned to form in less than a year after tearing their ACL, so Peterson will be limited even if he's available to play in Week 1. The Vikings are not a threat to make the Super Bowl, so there's no reason to rush their franchise player back. He's still a candidate for PUP, which would sideline him for the first six games of the season.