FORT LAUDERDALE, Fla. -- The Orioles' infirmary list may not be growing, but it doesn't appear to be shrinking either. The club has several pitchers working back to full speed and full strength, and manager Dave Trembley took the time Thursday to apprise the media of their assorted whereabouts.

The first pair of pitchers on the list, Brad Hennessey and Rich Hill, were temporarily shut down due to elbow soreness. Hill underwent an MRI test on his left elbow and was found to have no structural damage, while Hennessey was given a cortisone shot and has slowly been making his way back to the mound.

Hennessey threw long-toss on Tuesday and again on Thursday, but the Orioles still aren't sure when he'll pitch again. For now, the former first-round Draft pick is just happy to feel healthy.

"I was worried the other day after throwing, just tentative after having something bother me," said Hennessey. "You wonder how you're going to react. It felt good that day and the next day, so I think that's a positive sign."

The Orioles still aren't sure when Hill will throw again, but they have defined timelines for a few of their other arms. John Parrish, for instance, had a cortisone shot in his left shoulder and has been able to throw long toss. Parrish, who was expected to compete for a rotation spot, can't really afford to fall behind much longer.

"He said he feels absolutely nothing," said Trembley. "I think we need to get him on the mound next week."

Mark Hendrickson, who has been slowed by a lower back ailment, is expected to throw a simulated game on Sunday. Adam Eaton, who was recently signed by the Orioles, will also throw a simulated game. And after Sunday, Trembley expects his arms to start rounding back into form.

"I think there's time for those guys to catch up," said Trembley of the open competition for his rotation. "I need to get Hendrickson, Eaton and those guys in that [intrasquad] game next week on the 13th. Then they'd fall right on schedule again on the 18th in that split-squad game. ... But I need to get them through Sunday first."