Appearing on WGR 550 in Buffalo this morning, Bills general manager Doug Whaley confirmed that running back Karlos Williams sustained a concussion this weekend, raising uncertainty about his status in Week 5 (Twitter links via Mike Rodak of ESPN.com). With LeSean McCoy also sidelined by a hamstring injury, Whaley acknowledged that the team will bring in some free agents for a workout, and will consider adding outside help.
Ian Rapoport of NFL.com (Twitter links) has now identified a couple participants in that audition, reporting that former third overall pick Trent Richardson will work out for the Bills. Ex-Colt Boom Herron, who tried out for the Patriots this week, will also be among the backs in attendance at the Buffalo workout, according to Rapoport, while John Wawrow of The Associated Press tweets that Alfonso Smith will be there as well.
As Rodak notes, recently released running back Bryce Brown could also be an option for the Bills, who will be significantly short-handed at running back if McCoy and Williams are both ruled out for this weekend’s game. Currently, Boobie Dixon and Cierre Wood, who was recently promoted from the team’s practice squad, are the only healthy backs on the 53-man roster.