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San Francisco Giants' Gregor Blanco hits a triple off of Washington Nationals pitcher Rafael Soriano to score Andres Torres during the ninth inning of a baseball game in San Francisco, Tuesday, May 21, 2013. (AP Photo/Jeff Chiu)
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San Francisco Giants' Pablo Sandoval, bottom center, celebrates with teammates after hitting a two-run home run off of Washington Nationals pitcher Yunesky Maya during the tenth inning of a baseball game in San Francisco, Tuesday, May 21, 2013. The Giants won 4-2 in 10 innings. (AP Photo/Jeff Chiu)
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San Francisco Giants' Gregor Blanco, right, scores past Washington Nationals catcher Kurt Suzuki (24) during the second inning of a baseball game in San Francisco, Tuesday, May 21, 2013. (AP Photo/Jeff Chiu)
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San Francisco Giants' Pablo Sandoval celebrates after hitting a two-run home run off of Washington Nationals pitcher Yunesky Maya during the tenth inning of a baseball game in San Francisco, Tuesday, May 21, 2013. The Giants won 4-2 in 10 innings. (AP Photo/Jeff Chiu)
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San Francisco Giants pitcher Matt Cain throws against the Washington Nationals during the first inning of a baseball game in San Francisco, Tuesday, May 21, 2013. (AP Photo/Jeff Chiu)
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Washington Nationals pitcher Stephen Strasburg throws during the first inning of a baseball game against the San Francisco Giants in San Francisco, Tuesday, May 21, 2013. (AP Photo/Jeff Chiu)
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Washington Nationals' Ian Desmond hits a double to score Ryan Zimmerman during the first inning of a baseball game against the San Francisco Giants in San Francisco, Tuesday, May 21, 2013. (AP Photo/Jeff Chiu)
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Washington Nationals pitcher Yunesky Maya walks off the mound after San Francisco Giants' Pablo Sandoval celebrates hit a two-run home run during the tenth inning of a baseball game in San Francisco, Tuesday, May 21, 2013. The Giants won 4-2 in 10 innings. (AP Photo/Jeff Chiu)