Miami has league's third-worst road record (26-45) after getting swept in Pittsburgh. Nationals up 8-1 in the season series and all eight wins were by multiple runs. The Marlins' starter, Darren McCaughan, has a 7.40 ERA this season.
Washington's starter, Mitchell Parker, has faced the Marlins twice, limiting them to one run each time. He's gone five straight home starts without allowing more than three earned runs. Miami is the NL's lowest-scoring team, so Washington has the offensive edge too.