I think that during the season the Orioles will eventually fall back, they've been playing well thus far but it's a 162 game schedule, i doubt they'll be able to hold that up. As for the Nats, well, it depends, cos they've been playing pretty well and received a shot in the arm when Harper came up (he wasn't taking any chances with his first big league blast - straight onto the grass, no need to pay a whole lot of money for that ball!) but their pitching has been immense, what worries me there is that Strasburg has a 160 innings limit, once he hits that there could be trouble.