Warren (knee) remained limited at practice Thursday, Teresa Varley of the Steelers' official reports.
Per Missi Matthews of the team's official site, coach Mike Tomlin indicated earlier this week that Warren was doubtful for Sunday's game against the Raiders, but the running back's limited participation Wednesday and Thursday offers some hope that he could be available this weekend. In any case, Friday's final injury report will clarify Warren's official Week 6 designation.