Helsley (elbow) will throw a live batting practice session Tuesday, Jake Rill of MLB.com reports.
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.