FILE - In this July 29, 2016, file photo, Minnesota Vikings running back Adrian Peterson is shown during the first day of the NFL teams training camp at Mankato State University in Mankato, Minn. Peterson will undergo surgery on his right knee to repair a torn meniscus and Vikings coach Mike Zimmer says the star running back could return this season. Peterson was injured in Sunday night’s, Sept. 18 victory over Green Bay. (AP Photo/Andy Clayton-King, File)
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