PHOENIX (AP) The Buffalo Bills have suffered another blow to their porous defense. Defensive end Mark Anderson will have surgery on his left knee and will be out indefinitely.
Anderson, who signed a four-year, $27 million contact prior to the season, suffered the injury - and had difficulty putting any weight on it - in the second half last Sunday during the 45-3 blowout at San Francisco.
``It looks like he needs surgery and he is going to be out, I don't know how long,'' Bills coach Chan Gailey said. ``He will be back. It is not like he is going to miss the rest of the season. They just said indefinite and they will no more when they go in.''
With Anderson's injury, 10-year veteran Chris Kelsay will take over the starting duties at right defensive end. Kelsay traditionally plays the left side. Kyle Moore will also see action and former All-Pro Mario Williams, who is battling a wrist injury, will remain at his left end spot.
``(Anderson) has been a very good addition to our football team. You hate to lose people that have his kind of energy and have been playing the way that he has been playing,'' Gailey said. ``It hurts your depth, it hurts your pass rush, and it hurts every little thing there. Next guy in line has to step up. We got three defensive ends right now and those guys are going to have to make it happen.''
The Bills attempted to improve their defense by signing Anderson and Williams in March. The plan's been unsuccessful so far.
Buffalo (2-3), which plays at Arizona on Sunday, has allowed a combined 97 points and 1,201 yards in its past two games.