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Vikings' Peterson has knee surgery; no other issues found

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Adrian Peterson,Ha Ha Clinton-Dix
Minnesota Vikings running back Adrian Peterson (28) tries to break a tackle by Green Bay Packers free safety Ha Ha Clinton-Dix, left, during the first half of an NFL football game Sunday in Minneapolis.
Andy Clayton-King | AP

The Minnesota Vikings say Adrian Peterson underwent knee surgery Thursday morning for a torn meniscus, and no additional issues were found.

The team called Peterson's surgery successful. He injured his right knee in Sunday night's game against Green Bay.

It's not clear whether the Vikings' all-time leading rusher will return this season. The team has held off putting him on injured reserve and gave no update on his expected return in their statement Thursday on the surgery.