As expected, Vikings linebacker Erin Henderson is on the inactive list for today's game against the 49ers at Mall of America Field.
Henderson, who suffered a concussion in the late stages of last week's 23-20 loss at Indianapolis, was officially ruled out on Friday. Marvin Mitchell will start in place of Henderson at weakside linebacker.
Jasper Brinkley, meanwhile, will inherit Henderson's role alongside Chad Greenway in the nickel defense.
Defensive end D'Aundre Reed was the only other Viking ruled out on the injury report with a calf injury.
The other Vikings inactive today are: receiver Jarius Wright, quarterback McLeod Bethel-Thompson, cornerback Brandon Burton, safety Robert Blanton and offensive lineman Mark Asper.