[2] A four-star recruit in ESPN's ranking,[3] he committed to Iowa State in October 2017, choosing the Cyclones over schools such as Illinois and Xavier.

[10] He received a larger role during the NBA Bubble as the Lakers had clinched the best record in the Western Conference and even started in the regular season finale.

[11] On September 12, 2020, Horton-Tucker scored 9 points in 10 minutes off the bench in Game 5 of Western Conference semifinals, helping the Lakers secure a 119–96 victory against the Houston Rockets and advance into the next round.

[17] On April 8, Horton-Tucker was suspended for one game for leaving the bench during an altercation between the Lakers and the Toronto Raptors.

[19] On October 11, 2021, it was announced that Horton-Tucker would undergo surgery to repair torn ligaments in his right thumb, ruling him out for at least four weeks.

[23] On August 25, 2022, Horton-Tucker was traded, alongside Stanley Johnson, to the Utah Jazz in exchange for Patrick Beverley.

[24] Horton-Tucker made his debut for the Jazz on October 19, recording three points and two steals in a 123–102 win over the Denver Nuggets.