Wang gave up seven runs (six earned) on seven hits and two walks while striking out four in 4 2/3 innings for Double-A Harrisburg on Tuesday night. He gave up three runs in 6 2/3 innings the outing prior to that and four runs over six innings on July 28.
Wang's current rehab assignment was scheduled to end Saturday, meaning the Nationals would have had to activate him or designate him for assignment. But with Wang still on the disabled list, his rehab clock should be pushed back until he can start another Minor League assignment.
At that point, he'll have 30 more days on rehab, meaning he would still be available to call up when Major League active rosters expand on Sept. 1.
Wang hasn't pitched in the Majors since June 30, and his last start for the Nationals was on June 19, when he gave up five runs on seven hits in 3 1/3 innings. The veteran right-hander has a 7.61 ERA and 2.15 WHIP in 23 2/3 innings in the Majors this season.