It’s no secret the the Arizona Diamondbacks are in a time of transition. One of the biggest changes coming to the Diamondbacks is their starting pitching. For the past two seasons, the Diamondbacks starting pitching has been, in a word, excellent. Over the previous two seasons, the Diamondbacks were tied for third in the majors and behind only the Dodgers in the NL when ranking by ERA-. Those results were largely the result of having a relatively healthy pitching staff and outstanding single-season performances by Robbie Ray and Patrick Corbin, backed up by Zack Greinke’s typical excellence.