Bills' Aaron Williams back at practice following scary neck injury

Buffalo Bills safety Aaron Williams was back on the practice field Wednesday following a frightening neck injury that forced him to leave the field in an ambulance and miss the last two games.

Williams is expected to play this week against the Tennessee Titans. He should slot in to his usual spot opposite Corey Graham in one of the NFL's best safety duos.

Absent from Bills practice were running backs LeSean McCoy and Karlos Williams. The former is expected to rest his injured hamstring for a few weeks, while the latter is in the league's concussion protocol.