The few white players on the Eagles seem to be falling one by one. Maybe it's similar to the way a neighborhood can only tolerate so many black families before the remaining whites flee for the hills and the whole place goes to hell. Kevin Curtis sat out practice once again Saturday because of swelling in his knee. <DIV =s_pNewsTextMain>Curtis is starting get an "injury-prone" label. There's been speculation that the knee swelling is related to his surgically repaired groin, but the team says it's nothing serious. Jason Avant is emerging as a guy Donovan McNabb can trust while Curtis misses time.