SANTA CLARA -- The Washington Redskins' ability to spring an upset against San Francisco got a little bit harder Sunday morning. According to ESPN980's Chris Russell and the team's broadcasting network, corner David Amerson will be inactive Sunday.

There was no reason given as to why Amerson would not be active, and he was not listed on the injury report during the week. Minus Amerson, the Redskins would have to start either Tracy Porter or E.J. Biggers. Though Amerson has been inconsistent this season, he does give them length on the outside and would be missed. It also means that two corners who have had their own issues in Porter and Biggers, will be elevated into greater roles.

Amerson has played in the first 26 games of his career and started the first 10 games this season. The Redskins' secondary already was weakened earlier this season when fellow starting corner DeAngelo Hall was injured. Bashaud Breeland replaced Hall and has impressed the Redskins with his performance.