"I felt really good," Papelbon said of his simulated game. "I felt normal, felt strong. I felt like my mechanics were there."
Papelbon went to great lengths to simulate game conditions Wednesday, running in from the bullpen, wearing his full uniform and facing live opponents in Stephen Drew and Chris Heisey.
Papelbon, who is on the disabled list for the first time in his career, said he feels ready to return, but understands the Nationals' desire to take his rehab slowly.
"I feel like I could go out there tomorrow and pitch, but right now it's time to be more cautious than anything and make sure I can go back to back."
Alex Putterman is a reporter for MLB.com based in Washington. This story was not subject to the approval of Major League Baseball or its clubs.