Minnesota Vikings running back Adrian Peterson, right, runs from Tennessee Titans defensive 

Minnesota Vikings running back Adrian Peterson, right, runs from Tennessee Titans defensive tackle Jurrell Casey, left, during the first half of an NFL football game on Sunday, Oct. 7, 2012, in Minneapolis. (AP Photo/Genevieve Ross)
Associated Press
Minnesota Vikings running back Adrian Peterson, right, runs from Tennessee Titans defensive tackle Jurrell Casey, left, during the first half of an NFL football game on Sunday, Oct. 7, 2012, in Minneapolis. (AP Photo/Genevieve Ross)
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