"We know he's appealed," manager Matt Williams said before Friday's 8-2 loss to the Phillies. "He's available tonight, and we hope to give him the ball in the ninth inning."
Papelbon, 34, has a 4-2 record with a 1.91 ERA and 24 saves this season split between the Phillies and Nationals. Papelbon has a 2.49 ERA in 20 games with Washington since being acquired in a midseason trade, and he has finished all but three of the games in which he appeared.
Papelbon declined to comment on the ongoing appeal.
Jacob Emert is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.