him to be healthy given his track record. That's part of who he is. Williams is a very good back, but he's not gone due to injury and it's silly to suggest otherwise.
Utah's injuries have included Booker, Aiono, Carter, Christian, Covey, Dimick, Fakaloaitonga, Hansen, McCormick, Moeai, Norris, Patrick, Scott, Singleton, Young, and Wilson. Those are all guys who were expected to contribute significantly if healthy, but they all missed varying amounts of time due to injuries.