Helsley has been on the 15-day injured list since late June with right elbow discomfort, and the right-hander threw 24 pitches in live batting practice Tuesday. The rehab outing will be his first game action in over two months, so he'll likely need to get a few appearances under his belt before becoming an option to rejoin the Orioles. A return before the end of the season remains in the cards, though.

It will be Helsley's first time facing hitters since he went down with right elbow inflammation in late June. If things go well Tuesday, Helsley's next step could be a rehab assignment. The veteran reliever is tracking toward a return later this month, though the Orioles could opt to shut him down if they fall out of the wild-card race.