Peterson progressing; Vikings stress caution

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EDEN PRAIRIE, Minn. (AP) -- Adrian Peterson is progressing ahead of pace through his left knee rehabilitation. The Minnesota Vikings won't promise he'll play in their first game.

Head athletic trainer Eric Sugarman said Wednesday that such a declaration "wouldn't be fair" to anyone. But Peterson left no doubt: He said he's "set" on being ready to take the field at full strength on Sept. 9 when the Vikings start the regular season.

The Vikings opened part of Peterson's regular rehab drills to the media, with more than three-dozen reporters and photographers watching him run around at the indoor field at Winter Park.

Peterson tore the anterior cruciate and medial collateral ligaments in a game last Dec. 24.