If all goes well in that outing, Greinke could return Aug. 9 when the D-backs take on the Mets at Citi Field.
Greinke has been out since he strained his left oblique muscle while warming up for the third inning of his start against the Phillies on June 28.
Steve Gilbert has covered the D-backs for MLB.com since 2001. Follow him on Twitter @SteveGilbertMLB. This story was not subject to the approval of Major League Baseball or its clubs.