On Monday night, Lidge didn't throw a single pitch.
Ryan Madson pitched the ninth inning and picked up his first save in the Phils' frenetic 13-11 victory over the Nationals at Citizens Bank Park. Lidge was unavailable because of inflammation in his right knee, it was announced after the game.
Lidge underwent an MRI on Monday and is listed as day-to-day. He will be re-evaluated Tuesday, and the Phillies are hopeful their closer won't have to be placed on the disabled list.
"We don't think so yet," manager Charlie Manuel said.
The soreness and inflammation is located in the same knee which was operated on twice in 2008.
Lidge noted the soreness is most evident when he pushes off the rubber from the stretch.
"Based on the MRI, I'm not overly concerned," Lidge said. "It didn't show any tears. I'm concerned on a small level because it's not feeling great."
Andy Jasner is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.