San Francisco coach Kyle Shanahan said Williams looks much better than he did last season, Matt Maiocco of NBC Sports Bay Area reports. "I think [Williams] has a different mindset - understands a little bit more the standard of the NFL and difference," Shanahan said Tuesday. "Joe's come a long way. I think his body looks a lot better than it did last year. He put on a lot of muscle mass and he took advantage of the year of not playing."