Minnesota Vikings running back Adrian Peterson (28) is hit by Washington Redskins 

Minnesota Vikings running back Adrian Peterson (28) is hit by Washington Redskins linebacker Perry Riley (56) during the first half of an NFL football game, Sunday, Oct. 14, 2012, in Landover, Md. (AP Photo/Richard Lipski)
Associated Press
Minnesota Vikings running back Adrian Peterson (28) is hit by Washington Redskins linebacker Perry Riley (56) during the first half of an NFL football game, Sunday, Oct. 14, 2012, in Landover, Md. (AP Photo/Richard Lipski)
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