As the article in the Post today said:
Almost every game, Zimmerman bats third, Dunn bats fourth. Together, the pair anchors the Washington Nationals' lineup, forming one of the most imposing 3-4 combos in baseball. Sometimes, as happened Sunday, they help stop a losing streak. The Nationals don't quite have a stopper, so Zimmerman and Dunn remain the best source of stability. Washington snapped its five-game skid Sunday for numerous reasons -- it's never just a two-man show -- but in the end, the Nationals' 8-3 victory over Milwaukee at Nationals Park felt like an alpha performance.