Houston Astros

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Houston Astros' new manager Bo Porter, right, with owner Jim Crane, answers questions during a news conference, Thursday, Oct. 18, 2012, in Houston. (AP Photo/Pat Sullivan)

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St. Louis Cardinals' Yadier Molina (4) is congratulated by Matt Carpenter (13) on a solo home run against the Houston Astros in the fourth inning of a baseball game, Monday, Sept. 24, 2012, in Houston. (AP Photo/Pat Sullivan)

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Houston Astros starting pitcher Zach Duke winds up in their spring training baseball game \against the Toronto Blue Jays in Dunedin, Fla., Saturday, March 10, 2012. (AP Photo/Kathy Willens)

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** FILE ** Houston Astros manager Brad Mills (right) discusses a call with umpire Gary Darling during the third inning of a baseball game against the Milwaukee Brewers on Saturday, Aug. 11, 2012, in Houston. (AP Photo/Dave Einsel)

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Washington Nationals' Jordan Zimmermann delivers a pitch against the Houston Astros in the first inning of a baseball game Thursday, Aug. 9, 2012, in Houston. (AP Photo/Pat Sullivan)

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Washington Nationals' Gio Gonzalez delivers a pitch against the Houston Astros in the fifth inning of a baseball game, Wednesday, Aug. 8, 2012, in Houston. (AP Photo/Pat Sullivan)

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Washington Nationals' Danny Espinosa (8) is welcomed back to the dugout by bench coach Randy Knorr (53) and fans after hitting a two-run home run against the Houston Astros in the second inning of a baseball game, Tuesday, Aug. 7, 2012, in Houston. (AP Photo/Pat Sullivan)

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Washington Nationals closer Tyler Clippard reacts as a Houston Astros' Brett Wallace fly ball to deep center field is caught to end the game with a 3-2 win in 12 innings of a baseball game Tuesday, Aug. 7, 2012, in Houston. (AP Photo/Pat Sullivan)

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Houston Astros' Brett Wallace walks off the field after flying out with two men on base to give the Washington Nationals a 3-2 win in the 12th inning of a baseball game Tuesday, Aug. 7, 2012, in Houston. (AP Photo/Pat Sullivan)

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Washington Nationals' Roger Bernadina (2) is safe at home as Houston Astros catcher Chris Snyder watches the ball hit the wall on a throwing error by Astros' Brian Bogusevic in the 11th inning of a baseball game Monday, Aug. 6, 2012, in Houston. (AP Photo/Pat Sullivan)