Grayson Allen Puts it Down for DUKE Winning Slam Dunk Brian HoraceMarch 31, 2014General Information, Results/ThoughtsLeave a Comment Duke signee Grayson Allen wins the McDonalds All-American Dunk Contest. Here is the dunk that shut. it. down. Share this:EmailFacebookLinkedInTwitterGooglePinterestTumblrReddit
