Besides having linebacker Keith Ellison placed on injured reserve today with a quadriceps injury, the Buffalo Bills' porous run defense took another hit.

The Bills ruled out defensive tackle Marcus Stroud for Sunday's game against the Jacksonville Jaguars due to a knee injury.

Somewhere, Jaguars running back Maurice Jones-Drew is smiling.

The Bills have the last-ranked run defense.

Plus, defensive tackle Kyle Williams is questionable with a knee injury. Only two defensive tackles are healthy, Spencer Johnson and John McCargo.

Meanwhile, strong safety Donte Whitner returns from a knee injury.

And rookie safety Jairus Byrd, who leads the NFL with eight interceptions, is questionable with a groin injury.

The Bills ruled out cornerback Ashton Youboty.

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