Robertson struck out all three batters he faced in the eighth inning of Minnesota's 3-2 loss to the White Sox. He got Alejandro De Aza swinging, Kevin Youkilis looking and Adam Dunn swinging.
"That was fun to see," manager Ron Gardenhire said. "You never know what you're going to get that first outing. We asked him after the fact if he was nervous, and he said, 'Absolutely.' But he maintained his composure. Three strikeouts -- you can't do much better than that as a pitcher."
Robertson admitted he did have butterflies out there, but said he was able to settle in despite the nerves.
"I was nervous, but it was a good kind of nervous," Robertson said. "I was confident. I've been waiting for this moment for a long time, and I felt like I was ready. But I mean, you can't prepare for pitching in front of that many people if you've never done it before, and it got loud, and I loved it."