Article Photos: Peterson ready to help Vikings chase playoff berth

Minnesota Vikings running back Adrian Peterson (28) rushes for a gain as Houston Texans' Connor Barwin (98) pursues during the third quarter of an NFL football game Sunday, Dec. 23, 2012, in Houston. (AP Photo/Patric Schneider)

Minnesota Vikings running back Adrian Peterson (28) rushes for a gain as Houston Texans' Connor Barwin (98) pursues during the third quarter of an NFL football game Sunday, Dec. 23, 2012, in Houston. (AP Photo/Patric Schneider)