Walker (oblique) was seen running on the side during Thursday's practice, Bob Condotta of The Seattle Times reports.
Walker thus seems destined to go down as a non-participant for a second straight session to begin Week 3 prep, giving him just one more chance to practice ahead of the weekend. If Walker misses a second game in a row Sunday against the Dolphins, Zach Charbonnet again will pace the Seahawks backfield.