Reilly (elbow) will begin a rehab assignment with the Orioles' Florida Complex League affiliate Tuesday, Roch Kubatko of MASNSports.com reports.
Reilly is ready to pitch in games following a long rehab from last year's right elbow UCL reconstruction. The right-hander was pitching at Double-A Chesapeake last year before getting hurt, and he will likely return there once his rehab assignment is over.