(Alex Brandon/AP)

UPDATE: First pitch is now anticipated for 8 p.m.

It’s 6:40 p.m and the field crew pulling the tarp onto the field so there will be a rain delay in anticipation of the storm clouds headed this way. Right-hander Jordan Zimmermann (3-5, 2.92 ERA) is scheduled to be on the mound for the Nationals, and right-hander Jason Hammel (7-2, 2.87 ERA) for the Orioles.