FILE - In this Sept. 18, 2016, file photo, Minnesota Vikings running back Adrian Peterson warms up before an NFL football game against the Green Bay Packers, in Minneapolis. Vikings running back Adrian Peterson is moving forward in the recovery from surgery on his right knee. Peterson ran some short sprints in the team's indoor facility on Tuesday, Nov. 29, 2016, while the athletic training staff supervised and his teammates went through practice. (AP Photo/Andy Clayton-King, File)
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