Miles grew up playing basketball for the Texas Titans on the Amateur Athletic Union (AAU) circuit alongside Cade Cunningham.[1] When Miles was in fourth grade, his AAU highlight videos drew national attention; Yahoo Sports labeled him "the elementary school Allen Iverson."[2][3] He attended Lancaster High School in Lancaster, Texas.[4] As a junior, he averaged 18 points, 4.5 assists and 2.3 steals per game, leading his team to a 31–3 record. As a senior, Miles averaged 21.4 points, four rebounds, four assists and three steals per game, leading his team to a 36–1 record. He was named SportsDayHS All-Area Player of the Year by The Dallas Morning News, as well as Class 5A Player of the Year.[5][6] Miles committed to playing college basketball for TCU over offers from LSU, Oregon and Oklahoma State, among other programs.[7]
College career
On January 30, 2021, Miles recorded a freshman season-high 28 points and five assists in a 102–98 overtime loss to Missouri.[8] As a freshman, he averaged 13.6 points, 3.5 rebounds and 3.1 assists per game. Miles was named to the Big 12 All-Freshman Team and earned All-Big 12 honorable mention.[9] As a sophomore, he averaged 15.4 points, 3.8 assists and 3.5 rebounds per game. He was named to the Second Team All-Big 12 as a sophomore.[10] On March 30, 2022, Miles declared for the 2022 NBA draft, forgoing his remaining college eligibility.[11] However, he later clarified that he did not hire an agent and is maintaining his college eligibility.[12] On April 11, Miles withdrew from the draft and announced he would return to TCU for his junior season.[13] He was named to the Second Team All-Big 12 as a junior.[14]
Miles represented the United States at the 2021 FIBA Under-19 World Cup in Latvia. He averaged 9.1 points, 3.9 assists and 3.3 rebounds per game, helping his team win the gold medal.[20]