Gio Gonzalez. (AP Photo/Alex Brandon)

Gio Gonzalez (6-4, 3.52 ERA), perhaps the Nationals’ best pitcher over the past two-plus weeks, takes the mound against the Orioles on a muggy night in Baltimore. Gonzalez is riding a 22-inning scoreless streak. He last allowed a run in the fourth inning of his June 18th start, his first back from the disabled list. Another left-hander, Wei-Yin Chen (8-3, 4.12 ERA), is slated to start for the Orioles. The lineups are here. As always, discuss the game below.