But if you ask his catcher, Drew Butera, he'll tell you a different story, as he was sure Liriano had to know he had history on the line.
"He's lying," Butera said with a smile. "I think they all realize it. No, I don't know. Maybe he was in one of those zones where he didn't realize it."
So maybe Liriano wasn't aware he was holding the White Sox hitless, but regardless, he still impressed Butera with not only his stuff -- especially his changeup -- but also with his composure on the mound.
"He was controlled mentally," Butera said. "In starts before, some emotions may have gotten the best of him, but tonight, he was just locked in and everything worked. He got a little help with guys chasing pitches, but I think that's because he attacked the zone so well."
Liriano also got plenty of help defensively, including an impressive running catch by Denard Span on a ball hit by Carlos Quentin to left-center field to end the fourth inning and save at least one run from scoring with two runners on base.
But it was Valencia's big play at third base that got all the attention, as he made a great stab on a hard-hit Quentin ground ball down the line and made the long throw from foul territory to keep the no-hitter intact to end the seventh.
"I've had plays like that in the past, it's either going to be a hit or it's a great play," Valencia said. "Luckily tonight, we got the out, and luckily, we had a no-hitter tonight."
Liriano also got a nice play in the final inning from Justin Morneau at first base, scooping a bounced throw from Matt Tolbert at shortstop for the first out.
"You've got to be ready for any kind of throw there," Morneau said. "I saw it halfway in the air, and I said, 'I've got to catch it.' The thing was just sitting there. It was as close to falling out of my glove as it could be. I could feel it. It wasn't stuck in there. I could feel that it wasn't perfect. Just luckily enough it stayed in there."
Tolbert later caught the last out on a hard liner from Adam Dunn to seal the no-hitter with Juan Pierre at first base after a walk.
The club rushed to Liriano after that final out to celebrate his remarkable performance, and it brought nothing but joy to Twins manager Ron Gardenhire.
"It's such a nice thing to see the young man smile like that," Gardenhire said. "He lifted everybody up in this clubhouse, and we definitely needed to be lifted up. It takes a superhuman effort like that, and that's what we got tonight, so very exciting for us."
Liriano, for his part, was just happy his defense was out there making plays to help him make history on a cold night at U.S. Cellular Field.
"They played great defense out there for me today," Liriano said. "I couldn't have done it without them."