Nose tackle Casey Hampton was unable to complete the team's run challenge on the opening day of training camp and will begin camp on the Physically Unable to Perform list.
Hampton, who skipped the team's offseason workout program, finished just five of the eight 100-yard sprints and jogs back to the starting line.
Hampton looked very much out of shape when he arrived here at Saint Vincent College.
Head coach Mike Tomlin would not put a timeframe on when the Pro Bowl nose tackle will be removed from the PUP, but did say that it could be some time.
Safety Troy Polamalu arrived with a sore hamstrong, but completed his run test, as did guard Chris Kemoeatu, who has some weakness in his triceps.
Both could be held out of practice Monday morning when the team takes the field for the first time.