BUFFALO (WGR 550 Sports Radio) -- The Buffalo Bills have added another quarterback, which may be an indication that Derek Anderson will be unable to play on Sunday against the Chicago Bears.
Former Chicago Bears and Philadelphia Eagles quarterback Matt Barkley was signed to the active roster. He may be the No. 2 quarterback Sunday if Anderson doesn't clear concussion protocol in time to play, which would also mean Nathan Peterman would be the team's starter under center.
Barkley, a fourth round pick of the Eagles in 2013 out of USC, has started eight NFL games, throwing eight touchdowns and 18 interceptions.
Peterman started the first game of the season for the Bills, but went just 5-of-18 for 24 yards in just over two quarters of action. The team then turned to rookie Josh Allen to start immediately after the Week 1 loss to the Baltimore Ravens.
Peterman returned to action in Buffalo's Week 6 game against the Houston Texans when Allen suffered a sprained elbow. Peterman threw a pick-six with less than two minutes to play in a tied football game.
Bills head coach Sean McDermott has already ruled Allen out of Sunday's game and still considers him week-to-week.
The Bills also signed free agent wide receiver Terrelle Pryor to the 53-man roster on Tuesday. Pryor was a quarterback in his first three pro seasons with the Oakland Raiders and also in college at Ohio State.
