Seattle Seahawks have signed running back Rod Smith off their practice squad. Marshawn Lynch has already been ruled out and Fred Jackson is dealing with a high-ankle sprain. If Jackson cannot play Smith will likely be the primary backup to starter Thomas Rawls. They do not have any other options other than full backs.
Fantasy Analysis:
If Jackson does attempt to play through his injury, he will be limited at best and is a high-risk candidate for re-injury. Smith likely wouldn't see much work, but will probably step in when Rawls needs a breather.