Williams injured his foot during Monday night's loss in New England, and did not return for the end of that contest. Bills head coach Rex Ryan told reporters earlier this week that Williams was using a scooter to move around One Bills Drive while the rest of his teammates practiced - but while it's not looking likely that Williams will suit up at Arrowhead, Ryan also reportedly doesn't believe it will be a long-term injury.
The Bills are already missing defensive tackle Kyle Williams (knee) on the defensive line, and Marcell Dareus has been limited this week with a knee injury, as well. That leaves edge rusher Jerry Hughes as the only fully healthy starter remaining on Buffalo's defensive line; mercifully, he has been playing great football over the last three weeks.
Aside from Williams and Williams, two other Bills haven't practiced this week, and are very unlikely to play: right guard John Miller (ankle) and wide receiver Marcus Easley (concussion).