Washington Nationals pitcher Zach Duke throws against the Houston Astros during the fourth inning of an exhibition spring training baseball game Tuesday, March 5, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
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Washington Nationals pitcher Zach Duke throws against the Houston Astros during the fourth inning of an exhibition spring training baseball game Tuesday, March 5, 2013, in Viera, Fla. (AP Photo/David J. Phillip)
