[1] For his senior year, he transferred to T. C. Roberson High School in Asheville, North Carolina, where he did not play basketball, to graduate a semester early.

[3] On August 6, 2018, he committed to playing college basketball for Houston over offers from Clemson, Florida State, Georgia Tech, Tennessee and Wake Forest, among others.

[6] Mills joined Houston at the semester break in January 2019, following his early high school graduation.

[7] He sat out his first season as a redshirt but practiced with the team and against backcourt starters Corey Davis Jr., Galen Robinson Jr. and Armoni Brooks.

[5] On February 19, 2020, Mills scored a freshman season-high 27 points, including 22 in the second half, in a 76–43 win over Tulsa.