EDEN PRAIRIE, Minn. — Minnesota Vikings running back Adrian Peterson says his back injury is “not a big deal,” meaning he should play Sunday against San Francisco.

Peterson was limited in practice on Wednesday because of the injury. He rushed for 92 yards and a touchdown last week against Detroit, and leads the NFL in rushing heading into the Vikings’ home opener against the 49ers.
Starting middle linebacker E.J. Henderson missed practice Wednesday because of a shoulder injury. Defensive coordinator Leslie Frazier said Thursday he believes Henderson will be fine.
Henderson leads the team with 17 tackles this season after missing most of last year with a foot injury.