Ross has been called up for his scheduled start Saturday against the Cubs, CSN Washington's Chase Hughes reports. A.J. Cole is headed back to the minors in the corresponding roster move. With Stephen Strasburg and Doug Fister on the disabled list, Ross may get more than one start if he pitches well as the Nats already have Tanner Roark slotted in as one of their other temporary starters. Ross has posted a 54:12 K:BB over 51.1 innings at Double-A Harrisburg (nine starts) this season.