"Everything was working well. I was just a little open," Cueto said through a translator. "I was up and a little open. I was trying, but I was unable to fix it. In the bullpen, everything was good. Everything was down."
The biggest hits were an opposite field two-run homer to right field by Derek Norris with one out and a two-out, two-run single lined to center field by Jed Lowrie.
Cueto, the expected Opening Day starter, threw 54 pitches vs. Oakland.
"Yes, I'm ready," Cueto said of his status for the regular season.
Cueto's likely final tuneup will come on Tuesday, when he is scheduled to pitch against the Cubs. This spring, he has a 7.02 ERA through five starts (16 2/3 innings).
"I'll just get ready for the next outing," Cueto said.
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon This story was not subject to the approval of Major League Baseball or its clubs.