I actually wrote about Mattson in my blog (sorry, shameless plug ) and I just don't think he should be in the lineup. His offensive abilities shined when had a group of more defensive defensemen around him and now that this d-corps is scoring and play making, he's getting lost in the shuffle. I go Poolman unless he continues to play like he did Friday. Before that, Tucker was better than Mattson.
Ausmus/Stetcher are both playing on a different planet. Huge steps for these two guys.