PITTSBURGH -- The Pittsburgh Steelers have been hit hard with the injury bug this week. As the team prepares for the Buffalo Bills in Week 5, all five Mike Piazza Jersey of their starting defensive backs are on the injury report.Ahkello Witherspoon mi sed last week's game with a hamstring Fernando Valenzuela Jersey injury that he suffered in Week 3. According to head coach Mike Tomlin, the starting cornerback isn't expected to make a return this week, and he started the practice week out as a non-participant.Other starting corners, Cam Sutton and Levi Wallace, are now also on the injury report. Sutton has a Julio Urias Jersey groin/hamstring injruy and Wallace a foot injury. Both were limited to start the week.At safety, Minkah Fitzpatrick is overcoming a knee i sue that should hold him Kirk Gibson Jersey back throughout the week. Terrell Edmunds is in concu sion protocol after leaving Week 4 Corey Seager Jersey against the New York Jets. Neither practiced.Without their starters, the Steelers would dig deep to find replacements. Tre Norwood, James Pierre, Miles Killebrew and practice squad member Josh Jackson are prime candidates to see expanded roles this week.Scroll to ContinueMake sure you Hyun-Jin Ryu Jersey for the latest news, exclusive interviews, film breakdowns and so much more!Follow All Steelers on Twitter: