"I don't know what it is," Dunn said. "It does it, I don't know how many times per year, a few times per year. It has been like that for eight years or something.
"It's fine. It's fine. It's there for a couple of at-bats. Some days it's there for a day or two. But it's fine today."
Dunn was back in the starting lineup, hitting fourth, for Thursday's series opener against the Rays. He stayed in the game Wednesday and drew three walks in his final three at-bats.
By Dunn's third at-bat, the numbness in his fingers had worn off and he felt fine.
"It sounds worse than it is," Dunn said. "X-rays, MRI, blah, blah. I've had so many opinions on it that I don't even know what it is anymore. As long as it's fine. … It never has lasted. Two days max."
Scott Merkin is a reporter for MLB.com. Read his blog, Merk's Works, and follow him on Twitter @scottmerkin. This story was not subject to the approval of Major League Baseball or its clubs.