Stephen Strasburg

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Washington Nationals pitcher Stephen Strasburg throws during a spring training baseball workout Thursday, Feb. 14, 2013, in Viera, Fla. (AP Photo/David J. Phillip)

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Washington Nationals pitcher Stephen Strasburg throws during a spring training baseball workout Thursday, Feb. 14, 2013, in Viera, Fla. (AP Photo/David J. Phillip)

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Washington Nationals pitcher Stephen Strasburg throws during a spring training baseball workout Thursday, Feb. 14, 2013, in Viera, Fla. (AP Photo/David J. Phillip)

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Washington Nationals pitcher Stephen Strasburg tosses a ball during a spring training baseball workout Thursday, Feb. 14, 2013, in Viera, Fla. (AP Photo/David J. Phillip)

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Washington Nationals pitcher Stephen Strasburg (37) warms up before the Nats play the St. Louis Cardinals in game three of the National League Division Series at Nationals Park in Washington on Wednesday, Oct. 10, 2012. (Andrew Harnik/The Washington Times)

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Stephen Strasburg celebrated the Nationals NL East championship and is enjoying the playoffs, despite not being allowed to pitch. (Associated Press)

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Washington Nationals starting pitcher Stephen Strasburg watches from the dugout during the eighth inning of their baseball game against the Atlanta Braves at Turner Field Saturday, Sept. 15, 2012, in Atlanta. (AP Photo/David Tulis)

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associated press Nationals ace Stephen Strasburg gave up five earned runs in three innings Friday against Miami in what was his last start of the season. He finished 15-6 with a 3.16 ERA and 197 strikeouts in 159¿ innings.

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Washington Nationals starting pitcher Stephen Strasburg wipes his face on the mound during the second inning of a baseball game against the Miami Marlins at Nationals Park, Friday, Sept. 7, 2012, in Washington. (AP Photo/Alex Brandon)

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Washington Nationals starting pitcher Stephen Strasburg throws during the second inning of a baseball game against the Miami Marlins at Nationals Park, Friday, Sept. 7, 2012, in Washington. (AP Photo/Alex Brandon)

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Washington Nationals starting pitcher Stephen Strasburg, left, walks to the dugout with catcher Kurt Suzuki before a baseball game against the Miami Marlins at Nationals Park Friday, Sept. 7, 2012, in Washington. (AP Photo/Alex Brandon)

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Washington Nationals relief pitcher Tyler Clippard, center, high-fives Gio Gonzalez (47) as Adam LaRoche (25), Roger Bernadina (2) and Stephen Strasburg (37) celebrate after defeating the Chicago Cubs 2-1 during a baseball game at Nationals Park, Monday, Sept. 3, 2012, in Washington. (AP Photo/Richard Lipski)