Bryce Harper

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Washington Nationals outfielder Bryce Harper finished with a 4.9 Wins Above Replacement, according to FanGraphs. (Associated Press)

Nationals outfielder Bryce Harper is the favorite to win the Baseball Writers Association of America's Rookie of the Year award over Reds infielder Todd Frazier and Diamondbacks pitcher Wade Miley. (Associated Press)

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Nationals center fielder Bryce Harper’s triple and home run in Game 5 may have been just the beginning of postseason greatness. The rookie phenom, who made his major league debut April 28, will turn 20 on Tuesday. (Craig Bisacre/The Washington Times)

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Washington Nationals center fielder Bryce Harper (34), left, and right fielder Jayson Werth (28), right, watch as the St. Louis Cardinals celebrate their win over the Washington Nationals in game five of the National League Division Series at Nationals Park, Washington, D.C., Saturday, October 13, 2012. (Andrew Harnik/The Washington Times)

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Washington Nationals catcher Kurt Suzuki (24) and Bryce Harper (34) head to the clubhouse after Game 5 of the National League Division Series between the Washington Nationals and the St. Louis Cardinals at Nationals Park, Friday, October 12, 2012. (Preston Keres/Special to The Washington Times)

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Washington Nationals center fielder Bryce Harper (34) hits a solo home run in the bottom of the third inning to put the Washington Nationals up 4-0 over the St. Louis Cardinals in game five of the National League Division Series at Nationals Park, Washington, D.C., Friday, October 12, 2012. (Andrew Harnik/The Washington Times)

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Washington Nationals shortstop Ian Desmond (20), left, celebrates as Washington Nationals third baseman Ryan Zimmerman (11) hits a two run homer to bring Washington Nationals center fielder Bryce Harper (34), right, home in the first inning to put the Washington Nationals up 3-0 against the St. Louis Cardinals in game five of the National League Division Series at Nationals Park, Washington, D.C., Friday, October 12, 2012. (Andrew Harnik/The Washington Times)

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Washington Nationals center fielder Bryce Harper (34) rounds second before safely siding into third in the first inning in Game 5 of the National League Division Series between the Washington Nationals and the St. Louis Cardinals at Nationals Park, Thursday, October 11, 2012. (Craig Bisacre/The Washington Times)

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Washington Nationals' Bryce Harper, right, low-fives Adam LaRoche after scoring on a home run by Ryan Zimmerman in the first inning of Game 5 of the National League division baseball series against the St. Louis Cardinals on Friday, Oct. 12, 2012, in Washington. (AP Photo/Alex Brandon)