[4] He later transferred to Prolific Prep in Napa, California, and averaged 9.3 points, 8.7 rebounds and 1.3 blocks per game.

[6][7] Missi played at the Nike Hoop Summit in 2023 and won The Grind Session World Championship with Prolific Prep, earning a place at the GEICO High School Nationals.

[8] He also played in the Nike Elite Youth Basketball League (EYBL) and averaged 12.7 points, 9.9 rebounds and 2.8 blocks per game with the PSA Cardinals.

[11] Following his freshman season, he declared for the 2024 NBA draft and received a green room invite.

[14] On 23 October, Missi made his NBA debut, putting up 12 points, seven rebounds, three blocks, one assist and one steal in a 123–111 win over the Chicago Bulls.