He was born to Brandon and Ashley Boswell in Champaign, Illinois.[3] He is of African-American and Samoan heritage.[4] Boswell attended Bottenfield Elementary and Edison Middle School in Champaign before transferring to Urbana Middle School, leading the Tigers to a state finals appearance. Following this, he departed for high school in California.[5]
He played for two schools throughout two seasons before transferring to Arizona College Preparatory for his junior year.[6]
Boswell reclassified as a high school student, forgoing his senior year of high school.[10] As the youngest player in college basketball in 2022, Boswell completed his freshman year at 17.[11]
In March 2023, Boswell was awarded the Pac-12 Freshman of the Week.[12]
After two years at Arizona, Boswell transferred to Illinois.[13]
Boswell joined the 12-player roster for the 2021 FIBA Americas U16 Championship in August 2021.[14]
He led the US to a 6–0 record and the gold medal with averages of 9.2 points, 3.7 rebounds, and 4.5 assists per game.[15]
In June 2023, Boswell joined the 12-player roster for the FIBA Under-19 World Cup.[16] In the semifinal, he contributed 11 points and five steals, but the USA suffered a historic 89–86 loss to France.[17]
