On January 10, 2018, Coleman registered his first career
double-double with 17 points and 12 assists in a 99–98 win over
TCU. On March 16, he recorded a career-high 25 points and four assists in an 87–83 overtime loss to seventh-seeded
Nevada in the first round of the
2018 NCAA tournament. In his freshman season, he averaged 10.2 points per game, 4.1 assists and 2.5 rebounds per game, earning All-
Big 12 Honorable Mention. Coleman averaged 9.8 points and 3.4 assists per game as a sophomore, while shooting 38.7 percent from the floor. For a second time, he was selected to the All-Big 12 Honorable Mention. On November 9, 2019, Coleman posted 22 points and seven assists in a 70–66 victory over
Purdue. As a junior, he averaged 12.7 points, 3.4 assists and three rebounds per game. He was named to the Third Team All-Big 12. Coming into his senior season, Coleman was named to the Preseason All-Big 12 Team. On December 2, 2020, Coleman scored 22 points and hit the game-winning jump shot with 0.1 seconds remaining in a 69–67 win against
North Carolina in the Maui Invitational championship. On March 13, 2021, he scored 30 points in a 91–86 win over
Oklahoma State at the
Big 12 tournament final. He was named tournament most outstanding player. ==Professional career==