The Facts: Williams suffered a concussion in last Sunday's loss to the Giants, Bills general manager Doug Whaley told a Buffalo radio station Tuesday morning. Williams is in the NFL's concussion protocol, and his status for next Sunday's game vs. the Titans in uncertain. "[Williams] told our trainers several hours after the game that he wasn't feeling well and our medical staff took a look at him," Whaley told WGR 550. "They put him through further evaluations late yesterday afternoon and it was determined that he'll have a concussion. So we'll see how he proceeds throughout the week." Whaley said the team will have running backs in for a workout this week, something that may have happened even if Williams was healthy given the uncertain status of usual starter LeSean McCoy, who's out indefinitely with a hamstring injury. McCoy missed last week's game and has said he won't play again until he feels like he's 100 percent. The list of those scheduled for workouts includes Trent Richardson and Daniel "Boom" Herron. The Bills promoted Cierre Wood from the practice squad last week, and Wood and Boobie Dixon are in line for more carries with Williams questionable. Whaley said the team bringing back Bryce Brown was "a possibility."

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