Williams is dealing with a knee injury, Ed Bouchette of the Pittsburgh Post-Gazette reports.

The Steelers haven't provided any details and don't have to release an injury report until Wednesday. At this point, Williams' absence wouldn't have much impact on the Pittsburgh offense, as he only has six touches in the two games since Le'Veon Bell returned from suspension. Fitzgerald Toussaint would be next in line to serve as Bell's top backup.

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