Kenneth Walker, running back for the Seattle Seahawks, is not participating in Tuesday's practice due to a strained oblique. He missed the Seahawks' Thanksgiving Day game and may be trending towards another absence in Week 13. Head coach Pete Carroll did not definitively rule Walker out for this week's game, but mentioned that he will go into the game with some questions. It appears that rookie Zach Charbonnet could be in line for another opportunity as Seattle's lead back.