The Pittsburgh Steelers will be without standout rookie defensive tackle Derrick Harmon against the Buffalo Bills after he suffered a knee injury against the Chicago Bears, head coach Mike Tomlin said.

The Pittsburgh Steelers have made some key changes to their practice squad after some injuries have forced their hand to add more depth. With the injuries to Ben Skowronek and DK Metcalf at wide receiver, the team decided to add wide receiver Cornell Powell, who came last week to workout for the Steelers.