Walker (oblique) didn't practice Monday, John Boyle of the Seahawks' official site reports.
After suffering a strained oblique in Week 11's game against the Rams, Walker was inactive for last Thursday's loss to the 49ers. He's opening Week 13 prep having apparently made little progress, but Seahawks coach Pete Carroll did note Friday that the team was hoping Walker would be able to play Thursday in Dallas even if he doesn't get in much on-field work this week, per Brady Henderson of ESPN.com. If Walker is sidelined again, Zach Charbonnet will be set to lead Seattle's backfield against the Cowboys, with DeeJay Dallas mixing in as well.