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BALTIMORE, MD - DECEMBER 08: Running back Adrian Peterson #28 of the Minnesota Vikings is helped off the field after injuring his foot during the game against the Baltimore Ravens at M&T Bank Stadium on December 8, 2013 in Baltimore, Maryland. The Ravens defeated the Vikings 29-26. (Photo by Larry French/Getty Images)

BALTIMORE, MD - DECEMBER 08:  Running back Adrian Peterson #28 of the Minnesota Vikings is helped off the field after injuring his foot during the game against the Baltimore Ravens at M&T Bank Stadium on December 8, 2013 in Baltimore, Maryland. The Ravens defeated the Vikings 29-26.  (Photo by Larry French/Getty Images)