SAN FRANCISCO - Catcher Wilson Ramos is out of the Nationals lineup one night after leaving Tuesday's game because of right hamstring tightness.
Jose Lobaton is behind the plate and just in case Ramos is completely unavailable, Kevin Frandsen is the Nats' emergency catcher.
Giants right-hander Matt Cain makes his second start off the disabled list and first since holding the Mets hitless through five frames of a seven-inning outing.
Tanner Roark starts for the Nats one outing after striking out 11 in eight scoreless innings in San Diego. He has lasted at least seven innings in three straight starts and has tossed four consecutive quality starts.
For the Nationals
CF Denard Span
3B Anthony Rendon
RF Jayson Werth
1B Adam LaRoche
LF Ryan Zimmerman
SS Ian Desmond
2B Danny Espinosa
C Jose Lobaton
RHP Tanner Roark
For the Giants
CF Angel Pagan
RF Hunter Pence
C Buster Posey
3B Pedro Sandoval
1B Michael Morse
SS Brandon Crawford
LF Gregor Blanco
2B Brandon Hicks
RHP Matt Cain
Update: The Giants have scratched Sandoval with flu-like symptoms. Here's their new lineup:
CF Angel Pagan
RF Hunter Pence
C Buster Posey
1B Michael Morse
SS Brandon Crawford
LF Gregor Blanco
2B Brandon Hicks
3B Joaquin Arias
RHP Matt Cain
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