[3] In his junior season, Christie averaged 25 points and 11 rebounds per game, earning Pioneer Press Player of the Year honors.

[4] As a senior, he averaged 24 points, 10.1 rebounds, 3.9 assists and 3.1 steals per game, leading his team to a 15–0 record.

[5][6][7] He was named to the rosters for the McDonald's All-American Game, Jordan Brand Classic and Nike Hoop Summit.

[15] In his Summer League debut, Christie scored five points and nine rebounds in a 100–66 California Classic win against the Miami Heat.

[21][22] On February 2, 2025, Christie was traded alongside Anthony Davis and a 2029 first-round pick to the Dallas Mavericks in exchange for Luka Dončić, Maxi Kleber and Markieff Morris.

[24] Christie's mother, Katrina (née Hannaford), played college basketball at Northwestern, scoring over 1,000 points, and is a psychotherapist.