Washington Nationals' Bryce Harper hits a two-run home run during the first inning of a baseball game against the St. Louis Cardinals at Nationals Park Thursday, Aug. 30, 2012 in Washington. (AP Photo/Alex Brandon)

Washington Nationals starting pitcher Edwin Jackson throws during the first inning of a baseball game against the St. Louis Cardinals, Thursday, Aug. 30, 2012, in Washington. (AP Photo/Alex Brandon)

Washington Nationals' Bryce Harper, center, celebrates his two-run home run with teammates during the first inning of a baseball game against the St. Louis Cardinals, Thursday, Aug. 30, 2012, in Washington. (AP Photo/Alex Brandon)

St. Louis Cardinals starting pitcher Jaime Garcia throws during the first inning of a baseball game against the Washington Nationals, Thursday, Aug. 30, 2012, in Washington. (AP Photo/Alex Brandon)

Washington Nationals catcher Jesus Flores, left, celebrates with relief pitcher Mike Gonzalez after a baseball game against the St. Louis Cardinals at Nationals Park Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)

Washington Nationals shortstop Ian Desmond fields a ball hit by St. Louis Cardinals' Skip Schumaker during the seventh inning of a baseball game at Nationals Park Thursday, Aug. 30, 2012, in Washington. Schumaker was out at first and the Nationals won 8-1. (AP Photo/Alex Brandon)

Washington Nationals right fielder Bryce Harper (34) celebrates with teammates after a baseball game against the St. Louis Cardinals at Nationals Park Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)

Washington Nationals starting pitcher Edwin Jackson follows through on a pitch during the eighth inning of 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)

St. Louis Cardinals second baseman Skip Schumaker can't make the throw after getting out Washington Nationals' Edwin Jackson out at second base during the sixth inning of a baseball game at Nationals Park Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)

Washington Nationals first baseman Adam LaRoche tosses the ball to pitcher Edwin Jackson for the out on St. Louis Cardinals' Carlos Beltran during the fifth inning of a baseball game at Nationals Park Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)

St. Louis Cardinals catcher Yadier Molina is hit in the knee by a pitch behind Washington Nationals batter Ryan Zimmerman during the sixth inning of a baseball game at Nationals Park Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)

Washington Nationals starting pitcher Edwin Jackson (33) celebrates with teammates during the eighth inning of a baseball game against the St. Louis Cardinals at Nationals Park Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)

Washington Nationals' Jayson Werth, right, celebrates his solo home run with teammate Bryce Harper during the fifth inning of a baseball game against the St. Louis Cardinals at Nationals Park Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)

St. Louis Cardinals shortstop Rafael Furcal, left, leaves the game with trainer Greg Hauck, and manager Mike Matheny during the sixth inning of a baseball game against the Washington Nationals at Nationals Park Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)

Washington Nationals starting pitcher Edwin Jackson, left, talks with catcher Jesus Flores 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)

St. Louis Cardinals' Matt Holliday steps over the ball to run to first as Washington Nationals catcher Jesus Flores waits for the ball to make the throw for the out at first during the sixth inning of a baseball game at Nationals Park Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)

St. Louis Cardinals shortstop Rafael Furcal, left, makes a throw over third baseman David Freese but Washington Nationals' Ian Desmond was safe at first during the sixth inning of a baseball game, Thursday, Aug. 30, 2012, in Washington. The Nationals won 8-1. (AP Photo/Alex Brandon)