"I remember it all from my rookie year," Davis said. In 2010, the 49ers' right tackle faced Long in Davis' ninth career game. On Thursday, 49ers offensive coordinator Greg Roman likened Chris Long to "a rolling ball of butcher knives," and Anthony Davis knows from experience how the Rams' defensive end can leave a mark. "Chris destroyed him," Ryan said. Williams says rookie guard Austin Rivers, the 10th overall pick, also is ready to come back from a sprained finger on his left hand that sideline him for one game.