Washington expects to have shortstop Ian Desmond and outfielder Michael Morse back from injury. Those returns could aid the Nationals in their quest to halt a four-game slide. Davey Johnson's squad has endured only three losing streaks of more than three games all season.
"There's no way to go through a season without that," third baseman Ryan Zimmerman said. "We just have to learn from our mistakes and keep playing good baseball. I mean, we've played good baseball, we've just gotten beat."
Washington's pitching staff has been a large reason the first-place Nationals have avoided lengthy skids.
"That's the key," first baseman Adam LaRoche said. "It's been that way all year. Firing the guys out there that we do, you're not going to consistently lose with those five guys going out there."
All five Nationals starters have ERAs under 4.00. That includes Stephen Strasburg (15-5, 2.85 ERA), whose season is winding down as his innings count creeps up. The right-hander, who has notched a victory in each of his last four outings, is expected to be shut down once he reaches about 180 innings. Strasburg will enter his start against the Marlins on Tuesday with 145 1/3 innings this season.
Miami will counter in the series opener with Ricky Nolasco (9-12, 5.07 ERA), who hopes for a better beginning to his start than he had in his last outing. On Tuesday, he surrendered five runs in the first inning before the Marlins rallied to win, 6-5, in 10 frames.
"Obviously, you don't want to put your team down, 5-0, and I don't know the last time we came back to win after a starter put the team down, 5-0," Nolasco said. "The offense just picked up the team. Nobody gave in. Nobody rolled over."
Nationals: Weather alters club's travel plans
With Tropical Storm Isaac moving toward South Florida, the Nationals remained in Philadelphia after Sunday's series finale.
The plan was for the club to travel to Miami on Monday afternoon rather than Sunday. It's the last trip to Miami for the Nationals this season.
Morse, who was hit by a pitch in his hand on Friday, played catch at Citizens Bank Park on Sunday morning. He is still battling soreness in his right wrist but is expected to play on Tuesday.
Marlins: More on Nolasco
Nolasco is just 1-6 with a 6.70 ERA in eight starts since the All-Star break. In two outings against Washington this season, the right-hander is 0-2 with a 6.35 ERA.
Giancarlo Stanton socked a home run in each of the three games at Dodger Stadium over the weekend. The right fielder belted eight home runs on the team's 11-game road trip. The eight homers are a Marlins record for a road trip.
Catcher Rob Brantly connected on his first Major League home run on Sunday.
Marlins second baseman Donovan Solano carries a personal best 10-game hitting streak into Tuesday's tilt.
Washington's streak of eight consecutive road series victories ended in Philadelphia over the weekend. The Nationals scored just five runs in the three-game sweep at the hands of the Phillies.