Pitcher Brad Hennessey apparently will not require an MRI on his sore elbow. The Orioles medical staff does not believe, at this time, that there is any structural damage in the elbow, and he'll be evaluated on a day-to-day basis.

"I told him to tell me when he's 100 percent,'' Trembley said. "We talked four or five times in the offseason and he wanted to know that he would have an opportunity here. I told him to be honest with me and tell me when he's 100 percent and our deal will stay the same."

Hennessey said his arm felt "about the same" when he woke up this morning, but seemed reassured that he'll still have a chance to win a job in the rotation if it clears up.

"He said 'Don't rush yourself and when you're ready get back at it,'" Hennessey said. "That's reassuring, but as a competitor, you want to do everything you can to get back on the field."

In the interim, Trembley said minor league prospect Brad Bergesen will take over Hennessey's place in the spring rotation.

Trembley also said that reliever Kam Mickolio (groin strain) has been cleared for full activities.