Vikes' Peterson limited in practice

EDEN PRAIRIE, Minn. -- Minnesota Vikings running back Adrian Peterson was limited in practice Wednesday with a back injury.

The NFL's leading rusher was listed on the team's injury report, three days after rushing for 92 yards and a touchdown against the Lions. The team hosts San Francisco this Sunday.

Vikings middle linebacker E.J. Henderson did not practice at all because of a shoulder injury. He had eight tackles in the 27-13 win over Detroit on Sunday and is the team's leading tackler this season.

Safety Madieu Williams was limited with a shoulder injury and linebacker Erin Henderson, E.J.'s brother, did not practice with a calf injury.