Bills head coach Chan Gailey mentioned that DE Mark Anderson could be out anywhere from â€three-to-nine weeks†after he injured his knee during last week’s game. “I’m probably wrong two or three weeks either way. I don’t know where yet. I think once we get a week of rehab in we’ll have a much better idea,†said Gailey, via BuffaloBills.com. Anderson, who signed with the team during free agency, has already had surgery on his knee and will now begin the recuperation process. The Bills will most likely look to Chris Kelsay and Kyle Moore to play alongside of Mario Williams. There is a reason to be optimistic for Bills fans seeing as RB Fred Jackson was also given a similar timetable, but managed to return after only missing 3 games. Source: NFL Trade Rumors