Unlike previous years when injuries slammed the blueliners, the Avalanche have a solid corps of replacements ready and waiting. In fact, guys like Cameron Gaunce and Tyson Barrie haven't even been utilized yet the depth is so deep. The most recent injuries to top d-men Erik Johnson and Shane O'Brien left a pretty big hole, but at least Johnson came back quickly. O'Brien, on the other hand, just started skating with the team on Monday. He's projected to be back against the Panthers on Wednesday. Meanwhile, his replacement, Ryan Wilson--who was arguably the Avs' best defenseman before his injury in December--has had solid games since his first night back. So what happens when the blue line is back to full strength?