WATCH: Duke's Grayson Allen Has Always Been a Mean Dunker!

For the majority of the country Grayson Allen is someone new, but thanks to his stellar second half performance in the national championship game the youngster is going to be known all over the country. While many of us marveled over his dunk from Saturday and his game-changing ability Monday night there are some that have always known how talented this kid is.

Like those that saw him in the high school slam dunk competition here:

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