Dallas (ankle) was listed as a non-participant at Tuesday's practice, John Boyle of the Seahawks' official site reports.
Dallas seemingly isn't trending toward a return from a one-game absence to play in Thursday's game against the 49ers, as he hasn't taken any reps in either of Seattle's first two Week 15 sessions. On a positive note for the Seahawks, Kenneth Walker (ankle) --who joined Dallas on the sideline for last week's loss to the Panthers -- put in a full practice Tuesday and appears to be trending toward a return. Walker looks poised to reclaim a lead role out of the backfield against San Francisco, leaving Travis Homer as the change-of-pace option if Dallas ends up missing a second straight game.