Asdrubal Cabrera is out of the lineup with right side tightness from Sunday and Danny Espinosa will start.
During the Nationals' 9-1 homestand, Bryce Harper produced base hits and promising signs.
The back-up catcher hasn't hit well this season but his defense has drawn rave reviews from pitchers and coaches.
Asdrubal Cabrera exited Sunday's Nationals win with tightness in his right side, but it shouldn't be a major injury.
Bryce Harper used Yasiel Puig's bat the other day, but swinging other stars' lumber is nothing new for Harper.
Stephen Strasburg will face Ryan Vogelsong to decide the series.
Jose Lobaton will continue his recent partnership with Stephen Strasburg.
Few prospects have generated as much excitement within the Nationals as Reynaldo Lopez.
Nationals' manager addressed the surprising revelation that his starter underwent a procedure to remove skin cancer from his neck this week.
Harper was picked off first Friday night, another base-running blunder in a season full of them.