GREEN BAY, Wis. (AP) Green Bay Packers cornerback Jaire Alexander and B.W. Webb Jersey linebacker Quay Walker are doubtful for Sunday's game at Pittsburgh.Alexander mi sed three games earlier this season with a back injury, but it's a shoulder i sue that has prevented him from practicing the last three days. Walker is dealing with a groin injury that likely will cause him to mi s a second straight game.When hes healthy, Alexander is one of the Packers top overall players. He was a second-team selection in Preston Brown Jersey last seasons .Hes one of the best in the busine s, LaFleur said. Anytime you dont have him, it doesnt nece sarily help your team. But we got confidence in the other guys. The other guys have been working hard and its an opportunity for somebody else to step up and thats what we expect.ADVERTISEMENT Green Bays secondary already is playing without cornerback Eric Stokes (hamstring) and safety Darnell Savage (calf), who are both and must mi s at least two more games. Safety Rudy Ford is questionable with a calf injury that kept him from playing against the Rams.Other Packers questionable for Sundays game with the Steelers (5-3) include defensive lineman Kenny Clark (shoulder), center Josh Myers (knee) Devonnsha Maxwell Jersey , offensive guard Jon Runyan Jr. (neck) and offensive tackle Yosh Nijman (back). Clark, Ford, Myers, Runyan and Nijman all practiced Lance Robinson Jersey on a limited basis Friday.The Packers (3-5) 20-3 on Sunday while relying on a starting secondary that featured two rookie seventh-round picks working alongside Alexander, cornerback Keisean Nixon and safety Jonathan Owens. Cornerback Carrington Valentine was taken 232nd overall out of Kentucky. Johnson, who played at Iowa State, went 242nd overall.The played well enough to keep the Rams out of the end zone all day, as Johnson got his first career interception and Valentine had three pa ses defensed.If Alexander cant play Sunday, Cam Sample Jersey the Packers also may need to give some opportunities to reserve cornerback Corey Ballentine, who has appeared in five games and was signed to the active roster off the practice squad on Oct. 25. The Packers also have Robert Rochell, who was signed off the Carolina Panthers practice squad on Oct. 25.___AP NFL: