Arrieta will work out of the bullpen, at least for now, and could be a starting option down the line. The Orioles have not yet decided on a starter for Monday, although that would be Freddy Garcia's normal day. Miguel Gonzalez is still tentatively slated to come off the DL and start on Tuesday.
With Reimold's injury, it's something that has slowed him since the spring and it isn't getting better. He will remain with the Orioles at least through the homestand with his DL stay retroactive to last Sunday.
Arrieta, who was dealing with some right shoulder tenderness, said he's feeling much better and was slated to start for Triple-A Norfolk on Saturday had he not been promoted. Arrieta last threw a pair of side sessions on Wednesday and Thursday and said he's worked hard to take the emotion out of pitching.
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.