Bears Johnny Knox in danger of missing entire season

Bears WR Johnny Knox admits that he could miss the entire 2012 season after undergoing back surgery last December.  "It could happen, but I'm staying optimistic," Knox said. "My main focus is in that weight room. That's all I'm focusing on. I'm not in a rush [to return]; this is my spine, the core of my body that I'm dealing with. This is not my knee or my ankle or my shoulder ... I'm taking my time on this."  Knox lost 30 pounds in the 2 months after the surgery, although he's gained 10 of those back.