Orioles designated hitter Jim Thome said doctors confirmed Saturday afternoon that the discomfort in his neck is being caused by spasms and he is hopeful within a day or two he'll be back in the lineup.

"Basically what I have is a spasm up in my upper neck, trap area," said Thome, who is hitting .261 with two homers in 18 games for the Orioles. "I woke up today and I was just a little more stiff than I have normally been. I came in and it was something that never really changed. So I brought it to (the medical staff's) attention and we are going to try and get it out of there as quick as we can."

Thome said he is getting treatment -- including ultrasound -- and will also take anti-inflammatory medication. The 41-year-old Thome said the muscular spasms are not related to the lower back issues that have plagued him in the latter part of his career.

"I'd say in a day or two hopefully it will be fine," he said.