You should draft Hubbard if you have the right expectations. He is a lottery ticket who could be a league winner if McCaffrey were ever to miss significant time. It's critical for Hubbard to improve his pass protection.
Is Alexander Mattison worth keeping?
But Mattison would be an RB1 if Cook is ruled out again, making him worth the mid-season stash regardless of Cook's status for Sunday if you have room on your bench. Mattison is arguably the most valuable backup RB outside of Kareem Hunt.
Is Tyrell Williams worth picking up?
Williams has the ability to break off some big runs and is worth a roster spot, especially if you have Edwards.