Washington Nationals pitcher Zach Duke throws during the sixth inning of an exhibition spring training baseball game against the Miami Marlins Wednesday, March 20, 2013, in Jupiter, Fla. (AP Photo/Jeff Roberson)
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Washington Nationals pitcher Zach Duke throws during the sixth inning of an exhibition spring training baseball game against the Miami Marlins Wednesday, March 20, 2013, in Jupiter, Fla. (AP Photo/Jeff Roberson)
