
Pittsburgh Pirates starting pitcher James McDonald throws against the Washington Nationals during the first inning Thursday, May 17, 2012, in Washington. (AP Photo/Haraz N. Ghanbari)

Pittsburgh Pirates starting pitcher James McDonald throws against the Washington Nationals during the first inning Thursday, May 17, 2012, in Washington. (AP Photo/Haraz N. Ghanbari)

Washington Nationals first baseman Adam LaRoche acknowledges the crowd between the seventh and eighth innings against the Pittsburgh Pirates on Wednesday, May 16, 2012, in Washington. LaRoche recorded his 1,000th career hit during the seventh inning on a double to deep right, scoring Jesus Flores, Bryce Harper and Ryan Zimmerman. (AP Photo/Haraz N. Ghanbari)

Washington Nationals first baseman Adam LaRoche acknowledges the crowd between the seventh and eighth innings against the Pittsburgh Pirates on Wednesday, May 16, 2012, in Washington. LaRoche recorded his 1,000th career hit during the seventh inning on a double to deep right, scoring Jesus Flores, Bryce Harper and Ryan Zimmerman. (AP Photo/Haraz N. Ghanbari)

Washington Nationals manager Davey Johnson stands in the dugout during the game against the Pittsburgh Pirates in Pittsburgh on Wednesday, May 9, 2012. The Pirates won 4-2, and the Nats struck out 11 times. (AP Photo/Gene J. Puskar)

Washington Nationals' Ryan Zimmerman walks back to the dugout after striking out to end the game against the Pittsburgh Pirates in Pittsburgh on Wednesday, May 9, 2012. The Pirates won 4-2. (AP Photo/Gene J. Puskar)

Pittsburgh Pirates' Rod Barajas, top right, is greeted by teammates after hitting a two-run home run off Washington Nationals pitcher Henry Rodriguez in the ninth inning in Pittsburgh on Tuesday, May 8, 2012. The Pirates won 5-4 in the walk-off homer. (AP Photo/Gene J. Puskar)

Washington Nationals pitcher Henry Rodriguez walks back to the mound after throwing his second wild pitch of the ninth inning against the Pittsburgh Pirates in Pittsburgh on Tuesday, May 8, 2012. The Pirates won 5-4. (AP Photo/Gene J. Puskar)

Pittsburgh Pirates' Rod Barajas, top right, is greeted by teammates after hitting a two-run home run off Washington Nationals pitcher Henry Rodriguez in the ninth inning in Pittsburgh on Tuesday, May 8, 2012. The Pirates won 5-4 in the walk-off homer. (AP Photo/Gene J. Puskar)