The Bills didn't need a running back two months ago, or even this past weekend.
Everything changed when LeSean McCoy suffered a hamstring injury in Monday's joint practice with the Browns. Backups Fred Jackson and Anthony Dixon are already injured, leaving the Bills dangerously thin at running back for the rest of the preseason, if not longer.
Rookie Karlos Williams also suffered an injury this week that will sideline him indefinitely, and Bryce Brown is coping with yet another hamstring issue. The Bills, at a loss for enough guys to work through practice drills, suddenly must solve a problem they never thought they would have.