As a senior, he averaged 24.1 points and 9.4 rebounds per game and led Hopkins to a Minnesota 4A state title over Lakeville North.

[4] He committed to play college basketball for Arizona over offers from Kansas, Kentucky, North Carolina and UCLA.

[7] Nnaji won the same award in the following week, most notably posting 26 points and 11 rebounds in an 87–39 win over San Jose State.

[8] He became the first Arizona player to score 20 points and collect 10 rebounds in his first three games since Brandon Ashley did so against Long Beach State in the 2012–13 season.

His younger sister, Maya, played college basketball at Arizona for two years before quitting to pursue her education.