Washington Nationals starting pitcher Zach Duke throws to the San Francisco Giants during the first inning of a baseball game on Monday, May 20, 2013 in San Francisco. (AP Photo/Marcio Jose Sanchez)

Associated Press
Washington Nationals starting pitcher Zach Duke throws to the San Francisco Giants during the first inning of a baseball game on Monday, May 20, 2013 in San Francisco. (AP Photo/Marcio Jose Sanchez)
Washington Nationals starting pitcher Zach Duke throws to the San Francisco Giants during the first inning of a baseball game on Monday, May 20, 2013 in San Francisco. (AP Photo/Marcio Jose Sanchez)
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