(Alex Brandon/AP)

Wang has been working with his personal trainer to rehab the right hip strain that landed him on the disabled list on Tuesday. Wang will go home to his native Taiwan during the four-day all-star break. When he returns, Johnson said he hopes Wang will have rehabbed and recovered enough to begin his minor league assignments.

Wang threw out in the bullpen under the supervision of pitching coach Steve McCatty on Saturday. Nationals coaches have worked with Wang to improve a quirk in his mechanics that was causing his arm to drag behind his body and preventing him from getting his hand on top of the ball enough to give it his trademark sink.

The right-hander, who switched spots with Ross Detwiler in the bullpen from the starting rotation, has the highest earned-run average (7.61) on the team. He has been ineffective since he rejoined the bullpen. Johnson has been concerned with Wang’s lack of improvement in his mechanics and pitching — but a reason, it seems, was the right hip strain.