Pittsburgh Pirates

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Washington Nationals' Nate McLouth (15) gets his foot to the second base bag before the tag by Pittsburgh Pirates shortstop Clint Barmes (12) for a stolen base during the fourth inning of a baseball game in Pittsburgh, Saturday, May 24, 2014. (AP Photo/Gene J. Puskar)

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Washington Nationals starting pitcher Stephen Strasburg (37) gets a visit from catcher Wilson Ramos during the seventh inning of a baseball game against the Pittsburgh Pirates in Pittsburgh, Saturday, May 24, 2014. (AP Photo/Gene J. Puskar)

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Pittsburgh Pirates' Jose Tabata drives in the tying run with a sacrifice fly off Washington Nationals starting pitcher Stephen Strasburg during the seventh inning of a baseball game in Pittsburgh, Saturday, May 24, 2014. (AP Photo/Gene J. Puskar)

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Pittsburgh Pirates' Josh Harrison, left, drives in the go-ahead run with a single off Washington Nationals starting pitcher Stephen Strasburg during the seventh inning of a baseball game in Pittsburgh, Saturday, May 24, 2014. (AP Photo/Gene J. Puskar)