Philadelphia's Pro Bowl guard Shaun Andrews will miss at least six weeks after having back surgery on Tuesday. However, there is a chance that the Eagles could be without Andrews for much longer. "We've had before guys come back in five weeks; guys have taken three months," team trainer Rick Burkholder said Wednesday. "It depends on when he gets his strength back and his symptoms go away. So we're just going to play it week by week with him right now." Andrews hasn't played since Week 2 against Dallas.