I know Mostert has been in a platoon his whole career and has never rushed for 1k yards in a season, though w the playoffs last year he did. He's probably better than Singletary, but not a game breaker. Juice is a good FB.
Folks worry about every game....mostly the same folks...the media has largely picked the niners, and this team went to a SB last year. I am still with you, this is not the kind of team thats killed us, we are a very good, have 2 borderline MVP canidates, and should be more confident in the team.
That being said, any given sunday...etc...