Washington Nationals

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Washington Nationals' Mike Morse has been a force at the plate and at first base. Morse is batting over .300 and has 12 home runs on the year. (AP Photo/Ben Margot)

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Washington Nationals first baseman Adam LaRoche will have season-ending shoulder surgery. In 43 games this season, LaRoche hit .172 with two home runs and 15 RBI. (Associated Press)

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Washington Nationals third baseman Ryan Zimmerman gets ready to take batting practice prior to a baseball game against the St. Louis Cardinals in Washington, Tuesday, June 14, 2011. Zimmerman was reinstated Tuesday from the disabled list after missing 58 games because of an injured abdominal muscle. (AP Photo/Ann Heisenfelt)

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Washington Nationals third baseman Ryan Zimmerman tosses his bat after striking out during the first inning against the New York Mets in a spring training baseball game, Tuesday, March 1, 2011, in Viera, Fla. (AP Photo/David J. Phillip)

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Washington Nationals' pitcher Livan Hernandez has links to drug kingpin Angel Ayala-Vazquez and his associates, court documents in Puerto Rico show. (Associated Press)

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Washington Nationals' John Lannon threw 6 1/3 innings and allowed one run in the Nats' 2-1 victory over the San Diego Padres. (AP Photo/Chris Park)

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Washington Nationals starting pitcher Livan Hernandez sits on the mound after being knocked down while catching a line drive hit by San Diego Padres' Chris Denorfia in the third inning of a baseball game, Thursday, June 9, 2011 in San Diego. (AP Photo/Lenny Ignelzi)

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Washington Nationals starter Livan Hernandez gave up six earned runs in 5 1/3 innings in the 7-3 loss to the San Diego Padres. (AP Photo/Lenny Ignelzi)

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Washington Nationals shortstop Ian Desmond has improved his defense significantly this season. The Nats also have 23 fewer errors than they did at this point in the season last year. (AP Photo/Jeff Roberson)

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Giants catcher Eli Whiteside celebrates with starting pitcher Matt Cain after Wednesday's victory against the Nationals in San Francisco. (Associated Press)

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Washington Nationals' Jordan Zimmermann works against the San Francisco Giants during the first inning of a baseball game Tuesday, June 7, 2011, in San Francisco. (AP Photo/Ben Margot)

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Washington Nationals' Jordan Zimmermann lays down an RBI sacrifice bunt against the San Francisco Giants during the fourth inning that proved to be the winning run in the 2-1 Nationals' victory. Zimmermann was also strong on the mound, throwing seven innings and allowing one run. (AP Photo/Ben Margot)

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Washington Nationals player Jerry Hairston, Jr., (left) walks with Monea Grier, 13, after having a catch during the Washington Nationals Youth Baseball Academy groundbreaking ceremony Tuesday at Fort DuPont Park in Southeast. (Rod Lamkey Jr./The Washington Times)

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Georgetown's Erick Fernandez, catcher, was selected in the 25th round of the MLB draft by the Washington Nationals. (Georgetown Athletics)

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Washington Nationals shortstop Ian Desmond reacts after striking out in a game against the Milwaukee Brewers. Frustration has been a common emotion for the Nationals this season. (AP Photo/Jeffrey Phelps)

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San Diego Padres starting pitcher Clayton Richard throws against the Washington Nationals during the third inning of a baseball game, Friday, May 27, 2011, at Nationals Park in Washington. (AP Photo/Jacquelyn Martin)

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** FILE ** Washington Nationals third baseman Jerry Hairston Jr. dives in vain for a ball hit by Logan Forsythe of the San Diego Padres for a single during the ninth inning of a baseball game on Saturday, May 28, 2011, in Washington. The Padres won 2-1. (AP Photo/Nick Wass)

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Washington Nationals' Roger Bernadina (2) is out at second as San Diego Padres second baseman Logan Forsythe throws to first to convert a double-play on a grounder by Washington Nationals' Michael Morse during the ninth inning. The Padres won 2-1. (AP Photo/Nick Wass)

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Milwaukee Brewers' Rickie Weeks (23) is congratulated by Craig Counsell and Corey Hart (1) after Weeks hit a two-run home run during the seventh inning of a baseball game against the Washington Nationals on Tuesday, May 24, 2011, in Milwaukee. (AP Photo/Morry Gash

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Washington Nationals starting pitcher Tom Gorzelanny wipes his face after giving up a two-run home run to Milwaukee Brewers' Corey Hart during the fifth inning of a baseball game Monday, May 23, 2011, in Milwaukee. (AP Photo/Morry Gash)