‘Arizona’s running game, already one of the worst in the NFL, took another blow when running back Ryan Williams hurt his left shoulder against St. Louis and had season-ending surgery. With Beanie Wells already sidelined for at least five games, that leaves the duties to LaRod Stephens-Howling, William Powell and Alfonso Smith. Stephens-Howling is the only one of the three with significant playing experience, and he missed the last two games with a hip injury. He is expected back against Buffalo.’