Head coach Steve Spagnuolo, at his afternoon press conference, said RB Steve Jackson has a strained quad and "we'll probably not get him this week."
He also added it will become a "week to week thing" after that.
The coach added he trusts Jackson as far as injuries go and that the team will have to see how things go this week.
Caddy Williams will likely fill in if Jackson can't go against a New York Giants team that's pretty banged up themselves. Williams could be a guy to target this week in the waiver wire, especially if you're a Jackson owner.