"Barclay's a disaster," an NFL executive in personnel said. "You can't count on the guy. He can't handle an edge rusher.

"Seventy-nine (Walker) can be a real player. He's a little stiff and isn't polished, but he's a powerful guy and at least he's competitive."

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But, with three starters out against the Eagles, Walker will replace T.J. Lang at right guard, Lane Taylor will fill in for Josh Sitton at left guard and Barclay will be back on the left side for Bakhtiari.

Walker took over for Bryan Bulaga at right tackle late in the second quarter in Pittsburgh and spent the next 20 plays matched against former Kentucky outside linebacker Bud Dupree (6-4, 269), an athletic phenom with a 4.61 40 and a 42-inch vertical jump who was drafted with the 22nd pick in April.

"Me knowing I had a good player out there, it took some mental strength to get over that hump," Walker said. "I wasn't able to breathe at tackle (11 snaps) in the Patriots game. First real reps out there in competition."

Dupree emptied his arsenal on 17 pass plays, settled for one hurry and appeared somewhat frustrated. Walker kept shoving his edge rushes wide of Scott Tolzien. He also blotted out Dupree on a bull rush, adjusted nicely to handle a slashing inside charge and passed off an end-tackle stunt as if it was second nature.