Sure, the Washington Nationals would love to lock up home-field advantage in the NL Division Series against the Los Angeles Dodgers. What Dusty Baker is more concerned about is getting ready for the playoffs, and that includes having pitcher Joe Ross ready to go, whether that's as a starter or reliever. Working his way back from the disabled list, Ross stretched himself out to 90 pitches, although that only carried him through four innings on a dreary Thursday in a near-empty stadium, and the NL East champion Nationals beat the Arizona Diamondbacks 5-3, helped by Wilmer Difo's first major league homer and Pedro Severino's second.