Washington Nationals starting pitcher Jordan Zimmermann throws to a Miami Marlins batter during the second inning of a baseball game at Nationals Park, Saturday, Aug. 4, 2012, in Washington. (AP Photo/Richard Lipski)

Washington Nationals' Ryan Zimmerman, center, awaits the arrival of teammate Danny Espinosa (8) after Espinosa hit a three-run home run in the eighth inning of a baseball game against the Florida Marlins at Nationals Park, Saturday, Aug. 4, 2012, in Washington. The Nationals won 10-7. (AP Photo/Richard Lipski)

Miami Marlins relief pitcher Mike Dunn wipes his head as he stand in the dugout after he allowed six runs to the Washington Nationals in the eighth inning of a baseball game at Nationals Park, Saturday, Aug. 4, 2012, in Washington. The Nationals defeated the Marlins 10-7. (AP Photo/Richard Lipski)

Washington Nationals' Bryce Harper (34) receives congratulations from teammate Michael Moore after hitting a solo home run in the eighth inning against the Miami Marlins during a baseball game at Nationals Park, Saturday, Aug. 4, 2012, in Washington. The Nationals came from behind to defeat the Marlins 10-7. (AP Photo/Richard Lipski)

Miami Marlins manager Ozzie Guillen, center, stands on the mound with Carlos Lee and catcher John Buck after relief pitcher Mike Dunn surrendered the lead and gave up six runs in the eighth inning to the Washington Nationals during a baseball game at Nationals Park, Saturday, August 4, 2012, in Washington. The Nationals defeated the Marlins 10-7. (AP Photo/Richard Lipski)

Miami Marlins catcher John Buck is late with the tag on Washington Nationals' Adam LaRoche, who scored in the eighth inning of a baseball game at Nationals Park, Saturday, Aug. 4, 2012, in Washington. The Nationals defeated the Marlins 10-7. (AP Photo/Richard Lipski)

Washington Nationals' Bryce Harper watches his solo home run in the eighth inning in a baseball game against the Miami Marlins at Nationals Park, Saturday, Aug. 4, 2012, in Washington. The Nationals came from behind to defeat the Marlins 10-7. (AP Photo/Richard Lipski)

Miami Marlins relief pitcher Mike Dunn raises his arms as he stands with teammate Greg Dobbs, after he committed an error at first base on a ground ball by Washington Nationals' Adam LaRoche's ground ball during the 8th inning of a baseball game at Nationals Park, Saturday, Aug. 4, 2012, in Washington. The error lead to a six run rally by the Nationals as they came from behind to defeat the Marlins 10-7. (AP Photo/Richard Lipski)

Washington Nationals batter Danny Espinosa watches his three-run home run to left field that gave the Nationals 9-6 lead over the Miami Marlins in the eighth inning during a baseball game at Nationals Park, Saturday, Aug. 4, 2012, in Washington. The Nationals defeated the Marlins 10-7. (AP Photo/Richard Lipski)

Washington Nationals right fielder Bryce Harper leaps for an RBI double by Miami Marlins' John Buck during the second inning of a baseball game at Nationals Park, Saturday, August 4, 2012, in Washington. (AP Photo/Richard Lipski)

Miami Marlins' Mark Buehrie delivers pitch to a Washington Nationals batter during the second inning of a baseball game at Nationals Park, Saturday, Aug. 4, 2012, in Washington. (AP Photo/Richard Lipski)