Corey Graham injury: concussion leaves Week 2 status uncertain

Buffalo Bills safety Corey Graham was injured on the first play of his team's 27-14 win over the Indianapolis Colts on Sunday, and after the game head coach Rex Ryan told reporters that Graham is now in the NFL's concussion protocol.

Per the rules of that protocol, Graham is not eligible to return to practice until he has undergone multiple days of training room observation and tests and has returned to baseline neurological function, both at rest and during exertion, and has then been cleared by both a team physician and an independent neurological consultant. All of that leaves his status very much up in the air for the Bills' Week 2 showdown with Tom Brady and the New England Patriots.

Graham was injured when making a low tackle on Colts running back Frank Gore, who caught a pass in the left flat on the first play from scrimmage for both teams. Graham was replaced in the starting lineup by Bacarri Rambo, who would likely draw the start again in Week 2 if Graham isn't cleared soon enough to play.