Hill is not making the quick progress the team was expecting when he started his throwing program last month. Washington was hoping that Hill would make it back by Sept. 1.
Hill has been bothered by a sore right forearm and hasn't pitched since June 24 against the Dodgers. There is nothing structurally wrong with the forearm -- his fastball was clocked in the 90-mph range. However, muscle soreness has prevented him from throwing a sinker, and doctors recommended that Hill rest the forearm.
"He has made good progress, but he is not as far along as I would have hoped," Bowden said. "I was hoping he would pitch in a game by Sept. 1. That's not going to happen now."
When Hill comes back, he will work out of the bullpen.
Meanwhile, outfielder Elijah Dukes, on the disabled list because of a right calf strain, is not having problems running the bases, but Bowden wants to see Dukes do some damage with the bat before being activated from the disabled list.
Dmitri Young [diabetes] will start swinging the bat on Sunday. The Nationals haven't given a timetable on when Young will return to the Major Leagues, but they are hoping it will take him 10-14 days to get back into baseball shape.
Bill Ladson is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.