New coach Bruce Arians said he prefers not to use a running back by committee approach.
"Backs by committee, one of them gets hurt you've lost half your committee or a third of your committee," Arians said. "I like guys who can play every down." Ryan Williams is the logical in-house candidate, but he'll have to prove his ever-questionable health. The Cardinals are also a good bet to add talent via free agency or the draft. They've been linked to Rashard Mendenhall and Reggie Bush, among others.