Updated at 6:02 p.m.
Drew Storen is expected to begin a rehab assignment with Class A Potomac on Thursday, putting the Nationals reliever on track to come off the disabled list for the club's first game after next week's All-Star break.
Storen (out since spring training with a bone spur in his elbow) will make four rehab appearances, manager Davey Johnson said, pitching every other day. That would make his final outing July 11 and leave him available to appear out of the Nationals' bullpen July 13 in Miami.
"That's the plan," Johnson said. "I think that would be enough."
The Nationals also announced shortly before tonight's game that Henry Rodriguez was activated off the disabled list, with Chien-Ming Wang placed on the DL with a right hip strain.
Rodriguez, who missed the last month with with a finger strain, has made seven rehab appearances for Class AA Harrisburg and Class AAA Syracuse and did not allow a hit (though he has walked five batters).
The return of Rodriguez forced the Nationals to clear a spot in their bullpen, and Wang wound up the choice. The veteran right-hander has not adapted well to a long relief role, and now the club believed he's not 100 percent healthy.
Wang's personal trainer, who has been traveling with the club for the last week, believes he's been unable to raise his arm to a proper angle to throw his sinker because of a problem with his hip.
"She thinks that he's some kind of out of whack, because he's not able to get in the position he needs to be where he's on top," Johnson said. "So she's been putting him through exercises and stuff to try to get his mechanics better. But that's a work in progress."
Wang's move to the DL is retroactive to Sunday, the day after he last pitched.
Meanwhile, bench players Chad Tracy (groin) and Xavier Nady (wrist) might also begin rehab assignments Thursday at Potomac.