Kenneth Walker, running back for the Seattle Seahawks, did not participate in Wednesday's practice due to an oblique injury. Both Walker and Zach Charbonnet (knee) missed drills at the start of Week 14, but coach Pete Carroll mentioned that they had some reps during an earlier walkthrough. Walker has already missed the Seahawks' last two games with a strained oblique. The state of Seattle's backfield is uncertain for Sunday's game against San Francisco, with DeeJay Dallas and Kenny McIntosh as the healthy options on the active roster.