The Nationals acquired left-handed starter Scott Olsen and power-hitting outfielder Josh Willingham from the Marlins on Tuesday in a five-player trade that sent second basemen Emilio Bonifacio and Jake Smolinski and right-hander P.J. Dean to the Marlins.

The 24-year-old Olsen's 30 wins over the past three seasons ranks second among pitchers 24 or younger, trailing only Tampa Bay's Scott Kazmir (35). Olsen, 8-11 with a 4.20 ERA in 33 starts in 2008, is expected to join John Lannan in the Washington rotation.

After posting consecutive 20-homer seasons (26 in 2006, 21 in '07), Willingham hit 15 in 102 games last season, averaging a home run every 23.4 at-bats. In moving to Nationals Park, Willingham will be playing in a facility where he hit three homers in just five games in '08.

Bonifacio, 23, hit .314 with 18 doubles, five triples, one homer and 32 RBIs in 95 games at the Triple-A level last season. Entering the 2008 season, he was tabbed by Baseball America as the fastest baserunner and best defensive infielder among Arizona farmhands. Dean, 20, went 4-1 with a 1.57 ERA in 10 starts at Class A Vermont, and Smolinski hit .261 at Class A Hagerstown.

"It is not easy to part with individuals who have come up in this organization and been a valuable part of the Florida Marlins, they will both be missed and we wish them nothing but the best in their careers," Marlins president of baseball operations Larry Beinfest said in a statement. "In return, Bonifacio is a switch-hitter and above-average runner and defender who is Major League ready. Smolinski and Dean have high top ends, and we look forward to them joining the Marlins in the near future."