2018 when the Rams rolled Todd Gurley who got injured, Malcolm Brown who got injured, John Kelly who got injured, and signed CJ Anderson off his sofa who came in and played awesome convinced me the value of running backs maybe isn't so high above replacement. I feel like the list of RBs who've done well after big contracts is basically Saquon and Adrian Peterson maybe and that's it. Though I'm sure I'm forgetting some.
Cook is a good player, but I just don't think at the RB position one player has enough added value over their backup to be worth a lot of the team's salary cap.