Peterson starts training camp on PUP

Pat Christman/The Free Press

Running back Adrian Peterson was placed on the physically-unable-to-perform list as he continues to rehab his knee, which means he can't participate in team drills.
He will work with trainers on an adjacent field, and coach Leslie Frazier said that Peterson will be evaluated daily to determine when he can join practice.
Peterson said Thursday that he would prefer to stay off PUP and participate fully, and he discussed that with Frazier.
"He put up a fight," Frazier said. "He said `don't hold me back.' He wants to get out there, but we have to be smart."
Tight end Mickey Shuler (heel) and receiver Stephen Burton (toe) both are on the non-football injury list, which means they will also practice individually. Frazier said he expects both to be back soon.
Percy Harvin spoke at camp and said that all the offseason issues, which reportedly included a trade request and other problems with management and coaches, were resolved.
"I'm at camp, I'm happy," he said. "I'm on board and ready to go out here and start practicing."
Defensive end Jared Allen said that not having to deal with lofty expectations, it might be easier for the Vikings to focus on the upcoming season.
"I think this is the first year where they're are no real expectations going into camp," Allen said. "Our expectations are the same, an NFC North title and get to the Super Bowl. But we were 3-13 last year, and we have a completely new team."