The breakdown comes from Grier thinking that if the RB position is "devalued" then it "makes sense" to go against the grain and sign vet RBs on the cheap instead of "wasting" draft picks on them. The thing is that regardless of how much you give them, RBs are just a plain bad deal on second contracts. Unless the player actually develops some sort of savvy and is more than just big, fast and strong. Guys who run themselves into contact repeatedly seem to have the steepest declines, like Ajayi, for example.
Grier decided that?