The Mets are fielding what is easily their worst lineup of the season thus far. The original lineup featured David Wright playing and batting third, but he's a late scratch with a jammed pinky.
With a lefty on the mound for Washington, Terry Collins had already chosen to play Justin Turner over Ike Davis, Scott Hairston over Kirk Nieuwenhuis, and Mike Nickeas over Josh Thole. The Hairston decision makes sense given his propensity to destroy left-handed pitching, but the Turner and Nickeas decisions do not. Hairston should be hitting ahead of Turner, too.
As for third base, Ronny Cedeno gets the start and will bat second in the order. Daniel Murphy moves down from the second to third spot in the order, and Jason Bay is hitting cleanup. It looks like this one depends very heavily on Dillon Gee and the bullpen, folks.