Washington Nationals' Edwin Jackson delivers a pitch in the third inning of the Nationals' 11-5 win against the Chicago Cubs at Nationals Park in Washington on Sept. 4, 2012. (Associated Press)

Photo by: Richard Lipski

Washington Nationals' Edwin Jackson delivers a pitch in the third inning of the Nationals' 11-5 win against the Chicago Cubs at Nationals Park in Washington on Sept. 4, 2012. (Associated Press)