The answer: TBD
The D-backs will not need to fill that spot in the rotation until May 14, when they take on the Dodgers in Los Angeles, and D-backs manager Kirk Gibson did not seem to be in a rush to make a decision.
"There are different scenarios," Gibson said. "You find out things can change. We're just going to wait and see how things develop."
Certainly a leading candidate has to be Josh Collmenter, who is 1-0 with a 1.46 ERA in six relief appearances. Collmenter, a starter throughout his Minor League career, has pitched out of the bullpen since being called up from Reno on April 15.
"I'm sure he would be," Gibson said, when asked about Collmenter being a candidate. "He just gets people out."
For him to be a successful starter, Gibson said Collmenter would need to improve his curve so that it complements his fastball and change.
One person who is not a candidate is Aaron Heilman, who tried to win a spot in the rotation this spring. The club prefers to keep him in the pen for now.