Why Matt Stairs?

   During the past couple of days, I have heard a lot of people demanding the release of Matt Stairs. Why? Stairs receives a very small amount of AB's, so he has had very little impact on this season. I understand that he often enters into the game during crucial situations, and yes he has done a less than stellar job as the designated pinch hitter, but I think that more fingers should be pointed at the bullpen (or more specifically, Sean Burnett). Can somebody please tell me why Burnett is still pitching in the 8th and 9th innings? He has a 5.59 ERA and hitters have an average of .270 against him (very bad for a late inning reliever). If anyone is to blame for the Nats' recent slide, it's Burnett, not Stairs.