Down Corbin Burnes, the D-backs need Pfaadt to turn a corner and pitch like the arm Arizona extended in the offseason. Even if the ERA isn't sparkling, Pfaadt needs to show he can keep a handle on games and limit the hard contact.

The Diamondbacks made a move to shore up their organizational pitching depth, signing right-hander Anthony DeSclafani to a major league contract and fitting him on the roster by optioning right-hander Bryce Jarvis to Triple-A Reno.