And 4th string in the near future. They moved guys in the past because they were needed to actually step in and carry the ball. They don't have to go find someone to be a garbage time RB.
And why would any of them immediately be better than someone like Javelle Brown? Cosper shouldn't be anywhere near this list. He's closer to a TE than anything.
Get through Army with your top 2 and then you can have Finau who IMO should be your #2 at worst, and 1B at best between the 20s. I don't know why anyone is talking about moving guys after we lost our 3rd/4th string guy.