NBA star Trae Young is beastin’ for the Atlanta Hawks right now … and he’s rewarding himself by buying a $1.5 million crib in his home state of Oklahoma!! TMZ Sports has learned … Trae bought himself a new 8,100-square-foot pad in Norman Oklahoma where he grew up — his first LEGIT house … and it’s loaded!!! The pad comes with 5 bedrooms, 6 baths, a massive kitchen, a pool with a cool slide, a pool house … and you can put up to 7 cars in his giant garage!