"Designated hitter Vladimir Guerrero didn't hit cleanup for the Orioles on Thursday night, but it had nothing to do with his waning production in the first half.

Guerrero came into the clubhouse Thursday afternoon still feeling discomfort in his right hand, were he was hit with a pitch by the Boston Red Sox's Kyle Weiland on Sunday.

"He came in about 1:30 and said he needed another day, pretty sore," Showalter said.

Guerrero was struck in the hand in the fifth inning and left Sunday's game — at the time, that concerned Showalter.

"As much as people pitch him inside and as much as he gets out over the plate, I've seen him hit a number of times through that area, and I thought to myself, at the time in Boston, for him to not be able to continue, he had to be in some real discomfort," Showalter said.

X-rays were negative, but team doctors might issue more tests, Showalter said.

"When you're dealing with that many small bones in that area, there's always concern that something might be there that didn't show up," he said."