[1] As a freshman, Thomas began playing basketball for Oscar F. Smith High School in Chesapeake, Virginia.

[3] For his junior season, he transferred to Oak Hill Academy in Mouth of Wilson, Virginia, where he joined Cole Anthony and Kofi Cockburn in one of the most touted teams in the country.

[5][6] In July 2019, he was named Offensive Player of the Year at the Nike Elite Youth Basketball League after averaging a league-best 29.5 points per game for Boo Williams.

[7] As a senior at Oak Hill, Thomas averaged 31.5 points, six rebounds and 3.4 assists per game, leaving as the program's all-time leading scorer.

[11] On November 18, 2019, Thomas committed to play college basketball at Louisiana State University (LSU).

[9] Sources: In Thomas's college debut on November 26, 2020, he scored 27 points in a 94–81 win against SIU Edwardsville.

[18] On October 19, 2021, Thomas made his debut in the NBA, coming off the bench to score two points in a 104–127 loss to the Milwaukee Bucks.

[25] On February 10, 2023, he was fined $40,000 by the NBA for saying "no homo", which was perceived as anti-gay, during a post-game interview following a game the night before against the Chicago Bulls.