Wada had a cortisone shot in his throwing elbow eight days ago, making Monday's outing "a real positive step for him," manager Buck Showalter said.
"He was pain-free today, but getting up even on the rubber, on the half-mound was a big step for him," Showalter said. "Going to wait and see how he feels tomorrow before we really map out anything in the future."
Three other O's pitchers dealing with health-related concerns are scheduled to throw in a simulated game Tuesday morning: right-hander Tommy Hunter is slated for two innings, while Zach Britton and Jim Johnson are going one apiece. Both of the righties, Hunter and Johnson, have dealt with lower back soreness, while the southpaw Britton is recovering from inflammation in his left shoulder.
Britton and Johnson both most recently threw bullpens on Sunday. Hunter at one time was scheduled to start on Tuesday against the Red Sox in Fort Myers, Fla., but it was decided last week that it would be best to push back game action.