Vikings' Ponder added to injury report

Health could be an issue for one of the quarterbacks in the Minnesota Vikings-Detroit Lions game Sunday.

After Matthew Stafford (leg) practiced without limitation Thursday, it's not the Lions with the worry.

Vikings' quarterback Christian Ponder, who has completed 70.1 percent of his passes without an interception in 2012, was limited in Minnesota's practice on Thursday because of a neck injury. Ponder was not on the injury report Wednesday.

Tight end Kyle Rudolph (thigh) and defensive end Jared Allen (back) were also listed as limited participants Thursday on the Vikings injury report.

Coach Leslie Frazier said he doesn't believe any of the injuries are serious and expects all three players to respond after a day of rest. Linebacker Erin Henderson (concussion) has not been cleared after not playing in the victory over San Francisco in Week 3.