Bryce Harper

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Bryce Harper leaps to make what could've been a home run-robbing catch on a ball hit by Braves pitcher Tim Hudson on Tuesday night. Harper collided with the scoreboard, though, and the ball popped out of his glove and over the wall in the Nationals' loss. (Associated Press photo)

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Washington Nationals' Bryce Harper runs towards home to score a run on a single hit by teammate Ian Desmond during the third inning of a baseball game against the Cincinnati Reds at Nationals Park on Saturday, April 27, 2013, in Washington. (AP Photo/Evan Vucci)

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Outfielder Bryce Harper homered twice on Saturday to help lead the Washington Nationals over the New York Mets. (Associated Press photo)

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Bryce Harper battled a stomach virus Wednesday night and was still 4-for-5 in the Washington Nationals win over the Miami Marlins. (Associated Press photo)

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Washington Nationals' Bryce Harper reacts after sliding safely into home during the first inning of a baseball game against the Miami Marlins at Nationals Park, Thursday, April 4, 2013, in Washington. (AP Photo/Alex Brandon)

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Washington Nationals outfielder Bryce Harper, pictured here with Thomas Tull, one of the producers of '42,' attended a reception at the White House on Tuesday to meet President Obama and screen the move, which is about Jackie Robinson breaking the color barrier in baseball. (Alba V. Tull photo)

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Washington Nationals left fielder Bryce Harper (34), center, celebrate with teammates as the Washington Nationals beat the Miami Marlins 2-0 on opening day at Nationals Park, Washington, D.C., Monday, April 1, 2013. (Andrew Harnik/The Washington Times)

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Washington Nationals left fielder Bryce Harper (34) takes the field with teammates to play the Miami Marlins on opening day at Nationals Park, Washington, D.C., Monday, April 1, 2013. (Andrew Harnik/The Washington Times)

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Washington Nationals left fielder Bryce Harper (34) hits his second home run of the game in the bottom of the 4th inning as the Washington Nationals play the Miami Marlins on opening day at Nationals Park, Washington, D.C., Monday, April 1, 2013. (Andrew Harnik/The Washington Times)

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Washington Nationals left fielder Bryce Harper (34), left, and Washington Nationals right fielder Jayson Werth (28), right, warm up with the team before the Washington Nationals play the Miami Marlins on opening day at Nationals Park, Washington, D.C., Monday, April 1, 2013. (Andrew Harnik/The Washington Times)

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Washington Nationals center fielder Bryce Harper (34) takes the field with his teammates during introductions Washington Nationals play the Miami Marlins on opening day at Nationals Park, Washington, D.C., Monday, April 1, 2013. (Andrew Harnik/The Washington Times)