Wiseman was born Mar. 31, 2001 in Nashville, Tennessee. He is the son of Donzaleigh Artis and has one older sister. Wiseman started high school at The Ensworth School in Nashville before transferring to Memphis East High School, where he was coached by former NBA guard Penny Hardaway for his junior season. Wiseman averaged 11.4 points and 5.0 rebounds per game for the United States at the 2017 FIBA Under-16 Americas Championship in Formosa, Argentina, helping the team win a gold medal over Canada. As a senior in high school, he was a consensus five-star recruit, and most recruiting services ranked him No. 1 in the 2019 class. Wiseman played for Hardaway again in college at Memphis, as the former NBA player had become the Tigers' head coach. Outside of basketball, Wiseman speaks Mandarin, reads Kobe Bryant's books and wants to own fast-food restaurants. Fans can follow the Nashville native on Twitter @BigTicket_JW and on Instagram @bigticket_j13.