LT Russell Okung out for Seahawks
Okung went through some running drills about two hours before Sunday's game, but walked off the field looking down and was later announced as being out. Frank Omiyale will start at left tackle for the Seahawks with the primary task of keeping DeMarcus Ware off the back of Seattle rookie QB Russell Wilson.
The Cowboys are without starting nose tackle Jay Ratliff and starting center Phil Costa, both ruled out on Friday. Costa has a back injury and Ratliff an ankle problem. Ryan Cook is expected to start at center for Dallas, with Josh Brent starting at nose tackle.