Voth will start Game 1 of Friday's doubleheader against Atlanta, Jesse Dougherty of The Washington Post reports.
He has given up 19 earned runs over his last 13.2 innings (four starts), and while the Nationals would love to upgrade his spot in the rotation, they don't have many viable alternatives. Wil Crowe, who is starting Game 2 as the 29th man, could potentially displace Voth if he impresses in his second MLB outing.