Washington Nationals left fielder Bryce Harper warms up before a baseball game against the Philadelphia Phillies at Nationals Park Tuesday, June 3, 2014, in Washington. (AP Photo/Alex Brandon)
Washington Nationals starting pitcher Doug Fister throws during the first inning of a baseball game against the Philadelphia Phillies at Nationals Park Thursday, June 5, 2014, in Washington. (AP Photo/Alex Brandon)
Washington Nationals left fielder Ryan Zimmerman catches a fly ball hit by Philadelphia Phillies' Chase Utley during the fourth inning of a baseball game at Nationals Park Tuesday, June 3, 2014, in Washington. (AP Photo/Alex Brandon)
Washington Nationals left fielder Ryan Zimmerman (11) watches his hit during a baseball game against the Philadelphia Phillies at Nationals Park Tuesday, June 3, 2014, in Washington. (AP Photo/Alex Brandon)
Philadelphia Phillies' Ryan Howard watches his two-run home run against the New York Mets in the fourth inning of a baseball game, Sunday, June 1, 2014, in Philadelphia. (AP Photo/H. Rumph Jr)
Philadelphia Phillies starting pitcher Cole Hamels throws against the New York Mets in the first inning of a baseball game Sunday, June 1, 2014, in Philadelphia. (AP Photo/H. Rumph Jr.)
New York Mets starting pitcher Jonathon Niese throws against the Philadelphia Phillies in the first inning of a baseball game Sunday, June 1, 2014, in Philadelphia. (AP Photo/H. Rumph Jr.)