In, I think, the second pre-season game I started getting nervous about the RBs, including J. Williams, watching them get knocked around, caught behind the line, easily tackled. not breaking through. One after the other. They seemed small, and light. And I kept wishing Karlos was there, that he'd taken his career seriously and was the "thunder" to McCoy's "lightning." I think his absence (or that of a similar back) has hurt the offense all season long. If he has indeed gotten himself in shape, and made some mental changes, I'd welcome him back in a heartbeat. And if he adds what he did last year, I believe the Bills are suddenly a team to reckon with going forward.
Fingers crossed.