Manager Torey Lovullo said what's perceived to be a minor health issue will bench his ace for the opener.
Lovullo, speaking before Monday's spring training game against the Chicago White Sox, said the tightness Greinke experienced in his groin in his latest start last Wednesday led to him being ruled out for what is usually his opening-day role. Greinke left that game after one inning.
If there had been no health issue, Lovullo said, Greinke would be on the mound for Arizona on opening day for the third straight season.
Lovullo said he's not ready to name who will take Greinke's place in the March 29 opener at home against Colorado, although Robbie Ray would seem to be the logical alternative.