Umpires try to restore order during the sixth inning when both benches and bullpens emptied onto the field of a baseball game between the Washington Nationals and the Chicago Cubs at Nationals Park, Thursday, Sept. 6, 2012, in Washington. The Nationals won 9-2. (AP Photo/Alex Brandon)
Washington Nationals pitcher Gio Gonzalez, lower right, congratulates teammate Ian Desmond after Desmond's seventh-inning home run gave the Nationals a 7-0 lead over the Chicago Cubs during their baseball game at Nationals Park, Wednesday, Sept. 5, 2012, in Washington. The Nationals defeated the Cubs 9-1 and Gio Gonzalez won his 18th game of the season. (AP Photo/Richard Lipski)
Washington Nationals second baseman Danny Espinosa makes the tag on Atlanta Braves' Jason Heyward, right, who was out at second on the steal attempt, during the sixth inning of a baseball game at Nationals Park on Tuesday, Aug. 21, 2012, in Washington. The Nationals won 4-1. (AP Photo/Alex Brandon)
Washington Nationals second baseman Danny Espinosa makes the tag on Atlanta Braves' Jason Heyward, right, who was out at second on the steal attempt, during the sixth inning of a baseball game at Nationals Park on Tuesday, Aug. 21, 2012, in Washington. The Nationals won 4-1. (AP Photo/Alex Brandon)
The Nationals sent John Lannan to Triple-A and will now use Ross Detwiler in the rotation to begin the season. (Associated Press)
Washington Nationals starting pitcher Ross Detwiler delivers during their baseball game against the Chicago Cubs at Nationals Park, Monday, Sept. 3, 2012, in Washington. The Nationals won 2-1. (AP Photo/Richard Lipski)
The Nationals have a .611 winning percentage at Nationals Park this season, their best home record in their history. (Associated Press)
The Nationals have a .611 winning percentage at Nationals Park this season, their best home record in their history. (Associated Press)
Washington Nationals starting pitcher Gio Gonzalez cheers with shaving cream on his face after pitching a complete game shutout in a baseball game against the St. Louis Cardinals at Nationals Park Friday, Aug. 31, 2012, in Washington. The Nationals won 10-0. (AP Photo/Alex Brandon)
