Jordan Zimmermann (5-6, 2.61 ERA) will take the mound in Miami, looking to lead the Nats to a win in the second-half opener. The Nationals will be facing Josh Johnson (5-5, 4.06 ERA). For the Nationals: LF Steve Lombardozzi CF Bryce Harper 3B Ryan Zimmerman RF Michael Morse 1B Adam LaRoche SS Ian Desmond 2B Danny Espinosa C Jesus Flores P Jordan Zimmermann For the Marlins: SS Jose Reyes 2B Omar Infante 1B Carlos Lee LF Logan Morrison 3B Hanley Ramirez RF Justin Ruggiano CF Emilio Bonifacio C John Buck P Josh Johnson