Washington Nationals' Adam LaRoche follows through on a home run as Philadelphia Phillies catcher Carlos Ruiz (51) watches during the second inning of a baseball game, Thursday, Aug. 2, 2012, in Washington. (AP Photo/Carolyn Kaster)

Washington Nationals starting pitcher Ross Detwiler delivers in the first inning during a baseball game against the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. (AP Photo/Carolyn Kaster)

Washington Nationals' Adam LaRoche watches his home run during the second inning of a baseball game against the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. (AP Photo/Carolyn Kaster)

Philadelphia Phillies' John Mayberry (15) is out at home plate as Washington Nationals catcher Sandy Leon (41) shows the ball during the second inning of a baseball game, Thursday, Aug. 2, 2012, in Washington. (AP Photo/Carolyn Kaster)

Philadelphia Phillies starting pitcher Cole Hamels (35) delivers in the first inning of a baseball game against the Washington Nationals, Thursday, Aug. 2, 2012, in Washington. (AP Photo/Carolyn Kaster)

Philadelphia Phillies' Ty Wigginton (24) is out on a slide into second as Washington Nationals left fielder Stephen Lombardozzi (1) leaps and watches his throw to first during the second inning of a baseball game, Thursday, Aug. 2, 2012, in Washington. (AP Photo/Carolyn Kaster)

Washington Nationals starting pitcher Ross Detwiler delivers in the first inning during a baseball game against the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. (AP Photo/Carolyn Kaster)

Washington Nationals' Jayson Werth (28) prepares to take the field for a baseball game against the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. The Nationals activated Werth from the 15-day disabled list after he was sidelined nearly three months by a broken left wrist. (AP Photo/Carolyn Kaster)

Philadelphia Phillies starting pitcher Cole Hamels (35) delivers in the first inning of a baseball game against the Washington Nationals, Thursday, Aug. 2, 2012, in Washington. (AP Photo/Carolyn Kaster)

Federal Reserve Chairman Ben Bernanke looks out over the field during a baseball game between the Washington Nationals and the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. The Nationals won 3-0. (AP Photo/Carolyn Kaster)

Federal Reserve Chairman Ben Bernanke, third from left, attends a baseball game between the Washington Nationals and the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. The Nationals won 3-0. (AP Photo/Carolyn Kaster)

Federal Reserve Chairman Ben Bernanke, right, attends a baseball game between the Washington Nationals and the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. The Nationals won 3-0. (AP Photo/Carolyn Kaster)

Washington Nationals relief pitcher Tyler Clippard reacts to striking out Philadelphia Phillies' Ryan Howard in the ninth inning of a baseball game, Thursday, Aug. 2, 2012, in Washington. The Nationals won 3-0. (AP Photo/Carolyn Kaster)

Washington Nationals relief pitcher Tyler Clippard delivers in the ninth inning of a baseball game against the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. The Nationals won 3-0. (AP Photo/Carolyn Kaster)

Washington Nationals relief pitcher Tyler Clippard delivers in the ninth inning of a baseball game against the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. The Nationals won 3-0. (AP Photo/Carolyn Kaster)

Washington Nationals' Jayson Werth walks back to first base during the eight inning of a baseball game against the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. The Nationals won 3-0. (AP Photo/Carolyn Kaster)

Washington Nationals' Jayson Werth tosses his bat as he reacts to being walked on a full count during the eight inning of a baseball game against the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. The Nationals won 3-0. (AP Photo/Carolyn Kaster)

Washington Nationals pitcher Jordan Zimmermann (27) talks with teammates before a game aganst the Philadelphia Phillies, Thursday, Aug. 2, 2012, in Washington. The Nationals won 3-0. (AP Photo/Carolyn Kaster)