Washington Nationals starting pitcher Jordan Zimmermann delivers to an Arizona Diamondbacks batter during the first inning of a baseball game at Nationals Park in Washington, Tuesday, May 1, 2012. (AP... more 

Washington Nationals starting pitcher Jordan Zimmermann delivers to an Arizona Diamondbacks batter during the first inning of a baseball game at Nationals Park in Washington, Tuesday, May 1, 2012. (AP Photo/Susan Walsh) less