Williamson attended Fundamental Prep in Greenville, South Carolina for his Freshman season and attended Spartanburg Day School in Spartanburg, South Carolina for his final three years of high school , where he was a five-star recruit and was ranked among the top players in his class. He led his team to three state titles during his high school career. Williamson was a McDonald's All-American and South Carolina Mr. Basketball as a senior in 2018. He gained national recognition in high s...chool for his highlight videos featuring his slam dunking ability. WILL BE SHIPPED USPS FIRST CLASS VIA BUBBLE WRAP AND ULTRA PRO SCREW PROTECTOR.