Harrison Barnes

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Golden State Warriors forward Harrison Barnes (left) collides with Washington Wizards forward Martell Webster during the first half of the Warriors' 101-97 win on Dec. 8, 2012, in Washington. (Associated Press)

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Harrison Barnes was thought to be the player who would help continue North Carolina's tradition of winning NCAA championships, but a Tar Heels title didn't materialize during the No. 1 high school recuit's two seasons in Chapel Hill. (Associated Press)

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Harrison Barnes averaged 17.4 points and 5.2 rebounds per game for the Tar Heels this season. (Associated Press)

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North Carolina Tar Heels' Harrison Barnes is defended by Ohio Bobcats' Ricardo Johnson, center, and D.J. Cooper during the second half of an NCAA tournament Midwest Regional game Friday, March 23, 2012, in St. Louis. (AP Photo/Charlie Riedel)

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North Carolina forward Harrison Barnes (40) dunks over Maryland guard Sean Mosley (14) during the first half of an NCAA college basketball game, Saturday, Feb. 4, 2012, in College Park, Md. (AP Photo/Nick Wass)

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** FILE ** In this Oct. 28, 2011, file photo, North Carolina's Harrison Barnes looks on during the first half of an exhibition NCAA college basketball game against UNC-Pembroke in Chapel Hill, N.C. (AP Photo/Jim R. Bounds, File)

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Marquette Chris Otule (42) reaches through the basket to block a shot by North Carolina's Harrison Barnes (40) during the second half of an an East regional semifinal game in the NCAA college basketball tournament Friday, March 25, 2011, in Newark, N.J. (AP Photo/Bill Kostroun)

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North Carolina forward Harrison Barnes (40) heads to the basket as Washington forward Justin Holiday (22) looks on in the first half of an East Regional NCAA tournament third-round college basketball game on Sunday in Charlotte, N.C. (Associated Press)

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North Carolina's Harrison Barnes, rear, and Kendall Marshall (5) struggle for a rebound with Maryland's James Padgett during the first half of an NCAA college basketball game in Chapel Hill, N.C., Sunday, Feb. 27, 2011. (AP Photo/Gerry Broome)