"Justin Morneau made last year's concussion sound like a part of his distant past Sunday, after a game spent getting his uniform dirty at Target Field.

Apparently, he spoke too soon.

Morneau began experiencing concussion symptoms Monday — a headache and fogginess — and the Twins immediately contacted the Pittsburgh specialist who treated Morneau through the injury that cost him last season's final four months.

The specialist recommended that Morneau take a baseline concussion test.

"The test is broken down into a series of mini-tests, and one of them came back, as the doctor described, as mildly below baseline," Twins trainer Rick McWane said.

"For the most part, the rest of the tests looked good. If you have to put a diagnosis on it, you can say mild concussion symptoms. He wasn't overly concerned."

Morneau, 30, said he felt much better Tuesday morning, but he'll be re-evaluated by one of the White Sox's team doctors on Wednesday. He still plans to travel with the team to Anaheim, Calif., after Wednesday's game but probably won't play until Friday, at the earliest.

"It's not even comparable to what it was [last year]," Morneau said. " I think it's more of a precaution-type thing, but it's something we need to monitor. We'll hopefully be good to go in a couple days."

Morneau hit the dirt at least four times Sunday in an 11-4 victory over the Tigers. He took an extra base twice and made a diving play to end the game. He traced his symptoms to a play in the second inning, when he dived for Alex Avila's ball down the first-base line.

"I kind of stuck when I hit the ground," he said. "I don't know if it was awkward. It felt kind of awkward. I'm sure it looked awkward. I think it jarred me a little bit.""