49ers' Shayne Skov: Suffers knee injury

Skov suffered a knee injury during Sunday's game against the Dolphins and won't be able to return, Nick Wagoner of ESPN.com reports.

Skov's injury leaves Michael Wilhoite as the primary backup option for Gerald Hodges and Nick Bellore at inside linebacker. Skov will look to return in Week 13 against the Bears, given he avoided any kind of long-term injury.