Bryce Harper

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Bryce Harper splashes water on his face in between innings during the Nationals game against the Colorado Rockies at Nationals Park, Washington D.C., Sunday, July 8, 2012. Game time temperature at the park was 95 degrees Fahrenheit. (Ryan M.L. Young/The Washington Times)

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Nationals rookie Bryce Harper was named to the National League All-Star team, replacing Marlins outfielder Giancarlo Stanton, who will be sidelined after undergoing knee surgery. (AP Photo/Nick Wass)

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Washington Nationals' Adam LaRoche runs to first base after hitting a ground ball that scored Bryce Harper in the ninth inning of a baseball game against the San Francisco Giants to win 6-5, Thursday, July 5, 2012, in Washington. (AP Photo/Evan Vucci)

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Washington Nationals outfielder Bryce Harper hit .270 with 22 home runs and 59 RBI in his first season in the big leagues. (AP Photo/Nick Wass)

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Washington's Bryce Harper was 11 months old when Chipper Jones made his major league debut in September 1993. They could be National League teammates in the All-Star Game if Harper gets in on the fans' vote. (Associated Press)

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Washington Nationals' Ryan Zimmerman (11) celebrates with Bryce Harper (34) and pitching coach Steve McCatty, right, after scoring during the fourth inning of a baseball game with the San Francisco Giants, Tuesday, July 3, 2012, in Washington. (AP Photo/Alex Brandon)

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Nationals outfielder Bryce Harper has become a phenomenon since making his major league debut Apri 28. Whether bonking his head with a bat, rifling off snappy one-liners or showing off his prodigious skills, the rookie has become one of most-talked about players in the majors. (Associated Press)