Pittsburgh Steelers FB Roosevelt Nix (knee), LB Vince Williams (hamstring) and LB Anthony Chickillo (foot) did not participate in practice Saturday, Sept. 28, and have been ruled out for Week 4. LB Jayrone Elliott (hamstring) fully participated in practice but is listed as questionable. CB Joe Haden (shoulder), C Maurkice Pouncey (non-injury), LB Mark Barron (non-injury) and OG Ramon Foster (non-injury) fully participated in practice and are not on the injury report.