Lidge started to feel pain while having a bullpen session on Wednesday in San Diego. This coming Monday, Lidge will go to Philadelphia to get further tests.
"That way we know what we are dealing with," Lidge said. "It kind of crept up on me a little bit. It got a good deal worse the last couple of days. I was throwing a bullpen [session] in San Diego. I knew I needed to say something, because if I entered the game, it probably wouldn't have been pretty. I let them know what was going on. I'll get it looked at and I'll figure out the timetable to get back [on the mound]."
With Lidge out of action, it means that right-hander Henry Rodriguez will be the closer. Lidge and Rodriguez were splitting the role before Lidge was put on the disabled list.
As for Perry, he had two saves and a 2.00 ERA in eight relief appearances for Syracuse. He is expected to be a middle reliever for the Nationals, but was likely not available for Friday's game against the Dodgers because he pitched the previous two days for Syracuse.