Washington Nationals starting pitcher Edwin Jackson (33) throws during a baseball game with the St. Louis Cardinals at Nationals Park, Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)
** FILE ** Washington Nationals starting pitcher Edwin Jackson. (AP Photo/The Canadian Press, Frank Gunn)
Washington Nationals starting pitcher Edwin Jackson throws to a Milwaukee Brewers batter during the first inning of a baseball game Thursday, July 26, 2012, in Milwaukee. (AP Photo/Jeffrey Phelps)
Washington Nationals starting pitcher Edwin Jackson delivers a pitch against the San Francisco Giants during the first inning of the Nationals' 9-4 victory on July 4, 2012, in Washington. (Associated Press)
Washington Nationals starting pitcher Edwin Jackson delivers a pitch against the San Francisco Giants during the first inning of the Nationals' 9-4 victory on July 4, 2012, in Washington. (Associated Press)
Washington Nationals starting pitcher Edwin Jackson throws to the Baltimore Orioles in the second inning of an interleague baseball game in Baltimore, Saturday, June 23, 2012. (AP Photo/Patrick Semansky)
Washington Nationals starting pitcher Edwin Jackson delivers to the Toronto Blue Jays during the first inning of an interleague baseball game in Toronto on Monday, June 11, 2012. (AP Photo/The Canadian Press, Frank Gunn)
** FILE ** Washington Nationals starting pitcher Edwin Jackson. (AP Photo/The Canadian Press, Frank Gunn)
Washington Nationals starting pitcher Edwin Jackson delivers against the Houston Astros during the third inning Thursday, April 19, 2012, in Washington. (AP Photo/Nick Wass)
