To put it in perspective, the defense before Campbell and Glenn arrived gave up the 2nd most points in NFL history. The defense Glenn inherited was worse than the 0-16 Lions defense. On top of that, they lost their top corner and best pass rusher to an Achilles injury and not to mention the other myriad of injuries. They also drafted two defensive lineman, a LB, and a CB last year. I'm sure they're expecting development out of those players as well.