SANTA CLARA, Calif. -- Ian Williams was developing into an important part of the San Francisco 49ers' defensive line rotation when he suffered a grotesque leg injury in Week 2 of last season.Williams suffered a fractured left fibula (near his ankle) and major ligament damage on a then-legal cut block from Seattle guard J.R. Sweezy. Williams still can't watch the play in which he was hurt. He has seen the beginning of the play and then he turns his head.