Beanie Wells still projects as the starting running back heading into the season even though rookie second-round choice Ryan Williams has impressed. Wells fumbled during the first full-contact goal-line session of camp.
Williams looks like the better pure runner. Where Wells is more of a downhill runner with straight-line tendencies, Williams has shown he can cut effortlessly, even at high speed.
We have Wells as a high-end RB4 right now with an ADP of the ninth round. Williams isn't far back at 43rd. The key for Arizona's offense will be the development of QB Kevin Kolb. If he can give them any kind of passing threat, the running game should improve as well. Right now, Wells is still the guy to pick to give your team some depth, but keep an eye on Williams.