[2] He finished his senior year averaging 20.1 points, 9.5 rebounds, 4.8 assists, three steals and two blocks per game to carry the Rams to the Class 7A state quarterfinals.

[3] Castle was selected to play in the 2023 McDonald's All-American Boys Game during his senior year.

[11] He made his NBA Summer League debut on July 6, putting up 12 points, six rebounds and three assists in a 97–65 loss to the Charlotte Hornets.

[14] Castle played for the United States under-18 basketball team at the 2022 FIBA Under-18 Americas Championship.

[17] Castle's father, Stacey, was a teammate with Tim Duncan at Wake Forest during the 1993–94 season.