It is injuries. Not bad drafting. If Bruss hadn't gotten hurt, he would be our RG for the next ten years. If Allen and Edwards had remained healthy they are solid up the middle. Noteboom wasn't playing well at LT, but maybe he could've straightened his game out with a continuous veteran OL. And Shelton was a wild card who also went down. If everyone is healthy they could gel and improve as a unit.
We are all frustrated with this season. But, a lot of it is simply health.
