The Marlins have the day off this Wednesday.
Miami begins a four-game series with the Nationals on Thursday night in South Beach.
The Fish are 44-and-59.
Dan Straily is scheduled to start for Miami opposite Washington's Stephen Strasburg.
On Tuesday evening, Marlins catcher J.T. Realmuto smacked a two-run homer in the first inning and drove in four as the Marlins blasted the Braves 9-3 in Miami.
Starlin Castro's three-run homer capped a five-run fifth inning for the Fish, who earned a split of the two-game set.
Wei-Yin Chen tossed six innings of three-run ball for the win.