The Marlins have traded pitcher Scott Olsen and outfielder Josh Willingham to the Washington Nationals for second baseman Emilio Bonifacio and two minor-league prospects.
Willingham said he was informed of the trade early Monday evening by Larry Beinfest, the Marlins' president of baseball operations.
Both Willingham and Olsen are due raises through salary arbitration.
Bonifacio, 23, was traded to the Nationals in July by the Arizona Diamondbacks. He has hit .240 in 169 major league at bats. But he is considered to be an outstanding fielder and has excellent speed. He stole at least 40 bases in four consecutive seasons in the minors.
The Marlins will also obtain minor-league pitcher P.J. Dean and shortstop Jake Smolinski in the deal.