It was Hirano's first appearance, and he showed a bit of nerves when his first pitch of the game sailed to the backstop.
"It was the first time, so there were a little nerves going on," Hirano said. "I was trying to get my command on all my fastballs, but I was putting a little too much on it, so they were going up. I wasn't happy with the outing, but I'm going to build up from here, get my body prepared and get my fastball command."
The D-backs are taking it slow with outfielder Jarrod Dyson, who missed most of September last year due to hernia surgery.
"He is building up," D-backs manager Torey Lovullo said. "So all the running, all the agility stuff that he's doing, is in a controlled environment with the strength and conditioning coaches. I know that it's going to take a little bit of time where he's wide open. He's been held out of all of our baserunning activities. But, while we're baserunning, he's doing something behind the scenes building up to that."
Zack Greinke will make his spring debut Sunday at 1:10 p.m. MT, when the D-backs play host to the Brewers at Salt River Fields. Kris Medlen, Ryan Atkinson, Jake Buchanan and T.J. McFarland are also scheduled to pitch. The game can be heard on Gameday Audio.