Vikings running back Adrian Peterson will be limited to conditioning work for the early days of training camp. He was placed on the active/physically unable to perform list Friday, with coach Leslie Frazier ignoring his All-Pro running back's plea to be allowed to participate in all practices.
Peterson has been rehabilitating his reconstructed knee since Dec. 30 surgery to repair torn anterior and medial collateral ligaments.
"He put up a fight," said Frazier. "Knowing Adrian like you guys do, he wanted to make sure. He said 'Coach, don't hold me back.' He wanted to get out there, but we've got to be smart."
Peterson was injured Dec. 24 at Washington. He said Thursday he was back to working out without limitations.
"I'm full go. I'm pretty much doing everything -- cutting, running, jumping."
Peterson said it was important to him to get a feel for reaction and "instincts of the game" involved with protecting his legs from would-be tacklers in live drills.
The Vikings are likely to proceed with caution in easing Peterson back into "live" action in practice and hold him out most preseason games.
He can be activated from the PUP list at any point in the preseason. If he remains on PUP in the regular season, he would miss at least the first six weeks of the season.