The Orioles activated Helsley (elbow) from the 15-day injured list Tuesday.
Helsley wound up being sidelined for seven weeks with right elbow inflammation. He struck out five of seven batters faced over two scoreless rehab innings with Triple-A Norfolk and should slide right back into the closer role in Baltimore. Helsley posted a 2.53 ERA and 15:7 K:BB over 10.2 frames while notching seven saves before he got injured.