Lee did not practice all week but officially was listed as doubtful. He took part in some conditioning work before the game, wearing a black splint. The Cowboys will be patient with making a decision on whether Lee would need surgery and miss the rest of the season.
Keith Brooking replaced Lee in the starting lineup and the Cowboys also will use safety Barry Church in some of the sub packages. Rookie linebacker Bruce Carter also is expected to see his first defensive snaps of the season.
The Seahawks are going without quarterback Josh Portis, receiver Kris Durham, safety Jeron Johnson, cornerback Ron Parker, offensive lineman Jarriel King, tight end Cameron Morrah and defensive tackle Al Woods.
Todd Archer covers the Cowboys for ESPNDallas.com. Information from The Associated Press was used in this report.