Mitchell in concussion protocol

49ers RB Elijah Mitchell is in the concussion protocol, HC Kyle Shanahan said. Mitchell was checked for a head injury during Sunday's loss to Seattle but was cleared to re-enter. He then reported concussion symptoms on Monday morning. We'll track his progress through the protocol this week. RB Jeff Wilson had his knee "flare up" on Sunday, per Shanahan, so he's also iffy for Week 14. JaMycal Hasty is the only healthy RB on San Francisco's roster right now.