Minnesota Vikings running back Adrian Peterson (28) walks off the field after an NFL wild card playoff football game against the Green Bay Packers Saturday, Jan. 5, 2013, in Green Bay,

 

              Minnesota Vikings running back Adrian Peterson (28) walks off the field after an NFL wild card playoff football game against the Green Bay Packers Saturday, Jan. 5, 2013, in Green Bay,
Minnesota Vikings running back Adrian Peterson (28) walks off the field after an NFL wild card playoff football game against the Green Bay Packers Saturday, Jan. 5, 2013, in Green Bay, Wis. Packers won 24-10. (AP Photo/Mike Roemer)