Tanner Roark. (AP Photo/Matt Slocum)

Tanner Roark (8-6, 3.01 ERA) starts Saturday because Gio Gonzalez couldn’t; his flight back to Washington had mechanical issues so he couldn’t throw his bullpen session until Friday. Roark will have had six days in between starts. The Nationals will face right-handed starter Matt Garza (6-6, 3.69 ERA). The lineups are here. As always, talk about the game below.