"I would like to see Gio [pitch] because he is five innings short of 200 innings. That's also a milestone, too," Johnson said.
If Gonzalez doesn't make the start, right-hander Tanner Roark would be on the mound.
Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also could be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.