Grayson Allen Wins McDonald's All-American Slam Dunk Contest (Video)

 Duke bound guard Grayson Allen wins the High School McDonalds All American Slam Dunk Contest. Allen was an unexpected highlight reel in the dunk contest taking home the trophy over Kelly Oubre, Karl Towns, Theo Pinson, and Justise Winslow. Checkout the highlights above and recap below.

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