The Buffalo Bills signed free agent running back Dan Herron to address an injury-depleted backfield that could be down yet another player. Herron signed on Tuesday after being one of several running backs to work out try out for the job at the team's facility. Buffalo is suddenly short on running backs after general manager Doug Whaley announced rookie Karlos Williams' status is uncertain after he sustained a concussion in a 24-10 loss to the New York Giants. More...