Just hours before the 49ers were to play the Seahawks in Seattle Sunday night, 49ers nose tackle Ian Williams posted a picture of himself on Instagram with the message, "Time to go get this Dub!!!"Williams, in his first season as the Niners' starter at the position, was pumped up to get a win, and to show what he could do after earning the job in training camp over veteran Glenn Dorsey.And the 49ers were excited about what he could bring to the defense in 2013.As 49ers defensive coordinator Vic Fangio had said this summer, Williams had taken his game to another level."He just kicked it up a notch," Fangio told reporters during training camp. "I think he saw an opportunity. We signed him to an extension, which gave him a message."Added Fangio: "We'll be fine there (at nose tackle) between him and Glenn Dorsey."Just minutes into Sunday night's game, however, Williams went down with an injured left ankle, the result of a low block from Seattle guard J.R. Sweezy, and had to be helped off the field. And on a night when the news was terrible for the 49ers – who suffered a 29-3 loss to their division rivals – the initial reports on Williams were that he may be out for the...