Blalock is scheduled to start Sunday's game against the Padres at Coors Field.
The right-hander will earn a second straight turn through the rotation after he fell just shy of delivering a quality start in his Rockies debut Monday, when he took a no-decision while limiting a potent Diamondbacks lineup to three earned runs on six hits and no walks. That outing came at a more neutral offensive environment at Chase Field, but Blalock will be difficult to rely upon Sunday while he pitches for the first time at the notoriously hitter-friendly Coors Field.