Adrian Peterson (ACL, MCL, meniscus surgery) believes he's "50-50" to be participate in training camp.
"I feel like I will be able to get out there and you call a run play or whatever, I'll be able to go through practice. That's how I feel. That's my mindset," said Peterson. "But I'm going to follow the protocol. Whatever the Vikings and their staff want me to do, then I'm gonna do that; but I'm not going to hinder myself. I'm going to let those guys know how I feel."