Orioles manager Buck Showalter confirmed Wednesday that Tillman (shoulder) won't come off the disabled list until May, Brittany Ghiroli of MLB.com reports.

It wasn't expected that Tillman would be available for the first month of the season after opening the season on the 10-day DL, but after the right-hander was able to complete his third bullpen sessoin Wednesday, Showalter reiterated that there was no change in the timeline. Tillman will have to face hitters and likely throw a simulated game before the Orioles clear him for a minor-league rehab assignment.