Johnson played basketball for Southwest DeKalb High School in Decatur, Georgia.[1] As a junior, he averaged 21.9 points, 5.9 rebounds, 5.3 assists and 4.5 steals per game, receiving Georgia Class 5A Player of the Year honors. Johnson played a postgraduate season at Hargrave Military Academy in Chatham, Virginia. He averaged 26.2 points, 7.4 assists, 4.7 rebounds and 3.1 steals per game per game, leading his team to a 37–4 record and the Final Four of the National Prep Tournament.[2] A four-star recruit, he committed to playing college basketball for Georgia in October 2019, despite never having an official visit, over offers from Texas A&M, Tennessee and Ole Miss, among others.[3]
College career
Johnson missed the first 10 games of his freshman season for academic reasons before being cleared to play on January 11, 2021.[4] Two days later, he made his debut, recording 21 points, seven rebounds and four steals in a 95–77 loss to Auburn.[5] On February 13, Johnson posted a season-high 24 points and four steals in a 115–82 loss to Alabama.[6] As a freshman, he averaged 13.5 points, 2.8 rebounds and 1.8 steals per game in 16 games, earning Southeastern Conference (SEC) All-Freshman Team honors. For his sophomore season, Johnson transferred to Auburn.[7]