Baker (concussion) was a limited participant in Wednesday's practice, Mike Reiss of ESPN.com reports.
Baker was sidelined for the Patriots' Week 15 loss to the Cardinals due to a concussion, which he disclosed Wednesday that he sustained during a car accident, per Doug Kyed of the Boston Herald. Though the rookie told Reiss that he passed the concussion protocol, Baker will still likely need to upgrade to full practice participation by Friday in order to play Sunday against the Bills. Baker has failed to register a catch over his eight appearances on the season.