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05/31/09 1:35 PM ET

Hamilton sits, to have MRI on Monday

Rangers All-Star slugger bothered by abdominal pain

ARLINGTON -- Josh Hamilton, out of the Rangers lineup on Sunday with abdominal pain, is scheduled to undergo an MRI on Monday which could determine the extent of his injury and whether or not he needs to go back on the disabled list.

"I don't want to, but ..." Hamilton said. "I don't like those two letters [D.L.], but if it's necessary, it's necessary. If it's not, we'll work through it and see where it goes from there."

Hamilton said he is playing at about "75 percent," but said it's "below 50 percent" when he tries to run. He was used at designated hitter on Saturday night and went 1-for-5.

"We'll know in the next couple of days," Hamilton said. "Right now, I'm hurt and sore and can't run. That's pretty vital to playing baseball."

Hamilton hasn't been the same since crashing into a wall making a catch against the Angels two weeks ago on a Sunday afternoon at Rangers Ballpark in Arlington. He missed the next three games and has been playing in discomfort since then.

He is hitting .216 with one home run and five RBIs in the 10 games that he's played since the injury. For the season, he is hitting .234 with six home runs and 24 RBIs in 34 games. He has a .452 slugging percentage and a .285 on-base percentage.

"Baseball-wise it hasn't been a problem me getting frustrated," Hamilton said. "I'm struggling a little bit. The injuries are frustrating, more so the way I've been getting hurt running into walls. Last year I didn't have any plays like that, now it's happened twice."

Hamilton spent two weeks on the disabled list at the beginning of May because of a bruised left rib cage that he sustained running into a wall in Toronto. He was just starting to come around with the bat when he ran into the wall against the Angels. He originally suffered a strained groin muscle but the injury has worked its way up into the abdominal area.

"He's battling an injury and when you're battling an injury like that, you can't drive the ball," manager Ron Washington said. "Hopefully today and [Monday's off-day] will help it settle down a little."

T.R. Sullivan is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.