Second-year wide receiver Limas Sweed (hamstring) also didn't finish practice. Running back Willie Parker (back spasms) sat out a second successive day as the Steelers worked on their goal-line offense for the first time since camp began July 31.
Outside linebacker LaMarr Woodley returned after sitting out three days with swelling in his right knee.
Hampton, who missed three games last season with a groin injury, is considered the key to the Steelers' league-leading rushing defense.
Copyright 2009 by The Associated Press