Corey Graham injury: concussion leaves Week 2 status uncertain

Timothy T. Ludwig-USA TODAY SportsCorey Graham suffered a concussion on the first play from scrimmage on Sunday, and the Bills safety is now in the NFL's concussion protocol, leaving his 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…