Ross Detwiler and Jeff Samardzija traded blows, with Samardzija making only one mistake: Adam LaRoche's second-inning homer.
The Cubs are in town for this Labor Day matinee at Nationals Park.
Stephen Strasburg will hand over the ball to Davey Johnson twice more this year.
Neither Zach Duke nor Christian Garcia ever gave serious thought to the possibility of getting promoted to join the Nationals before season's end.
Sean Burnett's recent struggles out of the bullpen haven't been a result only of poor execution but of an elbow issue that plagued the left-hander earlier this summer.