Miley had pitched out of the bullpen for his first three appearances of the season before getting the start against the Phillies on Monday. In that game, he tossed six shutout innings to lower his ERA to 1.84.
"It's self-explanatory," Gibson said of the move.
Gibson was then asked if it was so self-explanatory, why did he wait until Friday to make the decision? Part of it was because the D-backs wanted to see if they needed to use their bullpen a lot the rest of the series against the Phillies.
"Again, just see how we got through it," Gibson said. "We pretty much were sure we were going to do it that way. I can't share all the reasons with you, but it will become clear as the season goes, I guess."
Miley's start on Monday came in place of Daniel Hudson, who was placed on the disabled list with a shoulder impingement.
"It's whatever, but I'm pumped about it in the same sense," Miley said. "I'm hoping Huddy gets healthy. I'll do what I can until then."
The laid-back Miley said the only difference for him between starting and relieving is the routine he follows. That being said, he does not have a preference as to which role he fills.
"Pretty sure it's better to be in the big leagues than anywhere else," Miley said with a smile. "It doesn't matter what your role is as long as you can help the team."