Skowronek suffered a concussion in Thursday's 28-27 preseason loss to the Bills, Brooke Pryor of ESPN.com reports.
Skowronek has entered the NFL's five-step concussion protocol. The wide receiver will need to be cleared by an independent neurologist to ultimately be cleared for game action. If the 29-year-old cannot recover from the injury by the Steelers' Week 1 showdown with the Falcons, Kaden Wetjen projects to fill the No. 5 wide receiver role.