Ryan Zimmerman

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Ryan Zimmerman hit the 150th home run of his career Wednesday night, his 22nd of the season. (Associated Press)

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Washington Nationals' Ryan Zimmerman hits an RBI double against the San Francisco Giants during the first inning of a baseball game, Monday, Aug. 13, 2012 in San Francisco, Calif. (AP Photo/George Nikitin)

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Washington Nationals SS Ian Desmond (20) is greeted at home plate by Ryan Zimmerman after hitting a 3-run home run in the first inning of the Nationals' 5-4, 13-inning home victory over the Atlanta Braves on Aug. 20, 2012. (Rod Lamkey Jr./The Washington Times)

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Atlanta Braves OF Jason Heyward is caught stealing Aug. 20, 2012, by Washington Nationals 3B Ryan Zimmerman in the first inning of the Nationals' 5-4, 13-inning home victory. (Rod Lamkey Jr./The Washington Times)

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Washington Nationals SS Ian Desmond (20) is greeted at the plate by teammate Ryan Zimmerman after hitting a three-run home run in the first inning of the Nationals' game against the Atlanta Braves at Nationals Park in Washington, D.C. (Rod Lamkey Jr./The Washington Times)

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Washington Nationals' Ryan Zimmerman (11) cannot catch the throw as Arizona Diamondbacks' Paul Goldschmidt (44) steals third base during the second inning of a baseball game, Sunday, Aug. 12, 2012, in Phoenix. (AP Photo/Matt York)

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Washington Nationals' Ryan Zimmerman (11) is congratulated by third base coach Bo Porter (16) following his two-run home run off of Arizona Diamondbacks pitcher Trevor Cahill during the fifth inning of a baseball game Friday, Aug. 10, 2012, in Phoenix. (AP Photo/Ralph Freso)

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Washington Nationals third baseman Ryan Zimmerman (11) and right fielder Bryce Harper (34) celebrate after the Nationals defeated the New York Mets 8-2 in ten innings in their baseball game at Citi Field in New York, Monday, July 23, 2012. (AP Photo/Kathy Willens)

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Washington Nationals Mark DeRosa (7) and Washington Nationals Bryce Harper (34) celebrate after they scored on Ryan Zimmerman's 10th-inning, three-run double in their 8-2 victory over the New York Mets in a baseball game at Citi Field in New York, Monday, July 23, 2012. (AP Photo/Kathy Willens)