This here.
Walker isn't even a particularly athletic strong-side end. Almost 5-flat in the 40, almost 8-flat in the 3-cone. Not only is he much less experienced than Cam Jordan, he's much less talented. I don't see the point. We've got Darryl Tapp as a solid Cam backup, and David Onyemata as a last resort.
We need the Willis/Rivers/Bowser/Hall/Lawson/Basham/Hendrickson/Dimick type.