(Baltimore, MD)  --  Seahawks running back Thomas Rawls, who's been playing in place of the injured Marshawn Lynch, is out for the season.  Rawls suffered a broken ankle and torn ligaments in the first quarter of yesterday's game against the Ravens, which Seattle won, 35-6.  DuJuan Harris and Fred Jackson remain the only healthy running backs on the Seahawks' active roster.  Head coach Pete Carroll indicated he could pick up another running back to boost depth.