Ross will be called up to make a start for the Nationals on Saturday, the Harrisburg Patriot-News reports. AJ Cole and Taylor Jordan have both stumbled in their spot starts, so Ross will be the next man up as the Nats try to plug the holes left by injuries to Doug Fister (forearm) and Stephen Strasburg (neck). The 22-year-old righty has a 2.81 ERA and 54:12 K:BB ratio in 51.1 innings for Double-A Harrisburg this season, and if he holds his own Ross could stick around for a couple of turns through the rotation.