It was the next-to-last start for the 24-year-old left-hander before he takes the mound in Sydney, Australia, on March 22 in Arizona’s season opener against the Los Angeles Dodgers.
Corbin settled down after giving up two runs in the second, striking out the side in the third before allowing a leadoff triple to Brad Miller in the fourth.
“I felt good,” Corbin said. “Just a couple of pitches here the second inning got out of it a little bit. But I feel like after the second inning, I was locating my fastball a lot better.”
Seattle’s James Paxton threw three scoreless innings, running his streak to seven to open the spring, before allowing a run in his fourth and final inning.
The 25-year-old Mariners right-hander gave up a run and five hits, striking out two and walking one. It was the first walk he’s given up this spring.
Paxton said it was good to come through when he wasn’t at his best.
“You have to be able to pitch without your best stuff,” he said, “because you’re going to be without your best stuff most of the time. You just have to bear down when you get yourself in tough spots.”
Corbin says he’s fine with the added work.
“The more I get out there the better I feel,” he said. “I wasn’t tired at all. I felt good.”
The Diamondbacks leave for Australia on Sunday after they play the Milwaukee Brewers.
He threw 68 pitches, 40 strikes.