Tillman had been dealing with shoulder pain the past two weeks, and he experienced discomfort when throwing on his work day Tuesday. The Orioles announced after Tuesday's 8-1 win over the Nationals that Tillman was headed to the DL. Tillman is eligible to come off Sept. 5, and he said he's optimistic he'll be ready then.
"It's tough," Tillman said Tuesday. "I don't like it, but it is what it is. It happened, and we've got to get better now. I think this is the best way to go about it, and we had talked about it a little.