His mother gave birth to him at the age of 19 but returned to the floor at SMU for her junior season and graduated as the Mustangs' all-time leader in points, rebounds, blocks and field-goal percentage.

He gave up football after an injury in middle school, after which he trained with his father to become a high-level basketball player.

[1] As a junior, he averaged 15 points, 4 rebounds and 2 assists per game and was named the District 8-6A Offensive Player of the Year.

As a true freshman, he averaged 10.9 points and 3.1 rebounds per game and was named to the Conference USA All-Freshman team.

[6] Harris chose the Wolf Pack after attending a game against Boise State after being impressed by coach Eric Musselman and welcoming fans and sat out the 2018–19 season as a redshirt, during which Nevada finished 29–5.

[1] After his redshirt season, coach Musselman left for Arkansas, and Harris entered the transfer portal again the day before the school hired Steve Alford.

[15] On July 1, Harris was dismissed and suspended from the NBA for violating terms of the NBA/NBPA (National Basketball Players Association) anti-drug program.

[18] In his first game with Scarborough, Harris recorded 18 points, 4 rebounds and 4 assists, shooting 40 percent from the field (6-of-15), in an 80–70 loss against the Montreal Alliance.

On November 2, 2023, Harris joined the Windy City Bulls[24] where he averaged 12.3 points, 3.1 rebounds and 2.5 assists en 23.7 minutes per game.

[27] Harris joined the Jiangxi Ganchi of the National Basketball League for 2024 season, he averaged 27.5 points, 4.9 rebounds, 2.5 assists per game.