Bills' Derek Anderson: Still working through concussion

Anderson (concussion) has been ruled out for Sunday's game in Miami, Chris Brown of the Bills' official site reports.

Anderson did practice on a limited basis all week, but he still hasn't suited up for game action since suffering the concussion during a Week 8 start against the Patriots. With Josh Allen healthy again and Matt Barkley seemingly passing Anderson on the depth chart, he's working toward getting back to a No. 3/mentor role the rest of the way.