The Cleveland Browns are down to their third-string quarterback.
With both Brandon Weeden and Colt McCoy missing practice Wednesday due to right shoulder injuries, Thad Lewis took first-team snaps in practice. Elevated from the practice squad on Monday, Lewis could make his NFL debut in Pittsburgh on Sunday.
The Browns also signed free agent quarterback Josh Johnson, who spent four seasons in Tampa Bay.
Johnson replaced safety Usama Young on the roster as the Browns look for protection at quarterback, where starter Weeden went out with a sprained right shoulder in Cleveland's 34-12 loss in Denver on Sunday.
Coach Pat Shurmur said Wednesday that McCoy also has a sore right shoulder. Neither Weeden nor McCoy practiced. Rookie running back Trent Richardson also missed practice because of a sprained left ankle.
''The injuries to Brandon and Trent are not as serious as you might have thought,'' Shumur said. ''We'll see how they come back. If they are ...