In his freshman debut on November 25, 2020, Miller scored a season-high 28 points, shooting 10-of-12 from the field and 6-of-8 from three-point range, in a 122–60 win over
North Carolina A&T. He set the program record for points by a freshman in their debut. As a freshman, Miller averaged 8.3 points and 2.8 rebounds per game. After the season, he transferred to
LSU over offers from
Kentucky and
Michigan, among others. On October 20, 2021, it was announced that Miller had
torn his ACL and would miss the season. Miller returned from injury and started for LSU the following season. After the 22-23 season ended, Miller transferred again, this time to Arizona State University. Due to transferring a second time without a degree, Miller required a waiver from the NCAA to play the 23-24 season. The NCAA denied Miller's waiver and thus deemed him ineligible to play. Because of this, Miller appeared due to miss the season, however the transfer eligibility rule was put on hold for the rest of the season, allowing Miller to participate. Following two seasons at Arizona State, Miller transferred to Gonzaga. ==National team career==