What is confirmed
Seattle's Saturday report clears both backs. Charbonnet (knee) had slipped to limited on Friday after four straight full practices, and Price (chest) practiced fully Friday after Seattle designated him to return from injured reserve. Underdog NFL and Seahawks.com writer John Boyle both noted the two backs have no game status, which means they are good to go.
Shaheed is out after missing practice all week. He will not play Monday.
What still needs to happen
Price was designated to return from IR earlier this week, so Seattle still has to activate him to the 53-man roster before kickoff. That move is expected but had not been announced as of Saturday evening.
How Seattle splits the work is the open question. Charbonnet is coming back from a knee injury and has not played a snap this season, so a cautious first game would not be a surprise. Price has the cleaner week of practice.
What RSO owners should do now
Charbonnet owners can plan to start him as a flex on Monday, with the caveat that his workload is unknown. If you have a reliable Sunday option, playing that back and holding Charbonnet until you see his usage is the safer call.