Isaiah Miller Jr. (born November 9, 1998)[1] is an American professional basketball player for the Austin Spurs of the NBA G League.

[2] As a senior, Miller averaged 20 points, six rebounds and 3.1 steals per game in leading the team to a 28–2 record and Region 8-AAAAAA championship.

[15] On August 3, 2022, Miller signed an Exhibit 10 contract with the Portland Trail Blazers,[16] but was waived prior to the start of the season.

[21] In August, APR won the inaugural Rwanda Basketball Cup, behind Miller's 43-point performance in the final against REG.

[22] On September 23, 2024, Miller and APR won the RBL championship after they defeated Patriots in Game 6 of the finals.

[25] On February 2, 2025, Miller had suffered a torn right anterior cruciate ligament and would miss the remainder of 2024–25 season.