Like Ryu and McCarthy, Scott Kazmir's 2016 season ended on the disabled list with thoracic spine inflammation. He opens 2017 back on the disabled list with a non-specific hip problem and a fastball MIA.
In the outfield, the one unpredictable issue is the herniated disc suffered by Andre Ethier, after he missed most of last season with a broken leg. But the outfield was already crowded, and Ethier's injury opened a spot for Andrew Toles, who was already in contention for a platoon role in left field.
The bullpen was a key element in the club's success last year, and in Arizona it looked like it was the area of greatest concern.