Mashburn is the son of former NBA player Jamal Mashburn. The younger Mashburn grew up playing baseball and lacrosse, and only turned to basketball at age 10.[1] He began his high school career at Gulliver Prep and averaged 24 points per game as a freshman.[2] As a sophomore, Mashburn averaged 27.4 points per game.[3] He earned first-team all-state honors.[1] For his junior season, Mashburn transferred to Brewster Academy.[4] At Brewster Academy, he played alongside teammates Kai Jones, Jalen Lecque, Terrence Clarke, and Kadary Richmond. As a senior, he earned first team All-New England Prep School Class AAA honors and led Brewster to the National Prep Showcase championship game, which was cancelled due to the COVID-19 pandemic.[5] Mashburn was regarded as a four-star prospect ranked the No. 88 recruit in his class and committed to Minnesota over offers from California, Auburn, Georgetown, and Saint Louis.[6]
College career
On February 17, 2021, Mashburn scored a freshman season-high 19 points in an 82–72 loss to Indiana.[7] He began receiving more playing time due to an injury to Gabe Kalscheur.[8] Mashburn made eight starts as a freshman at Minnesota and averaged 8.2 points, 1.6 rebounds and 1.6 assists per game. For his sophomore season, he transferred to New Mexico.[9] Mashburn followed his coach Richard Pitino, who was hired to coach the Lobos.[10] On January 8, 2022, Mashburn scored a career-high 29 points and had eight assists in a 90-87 overtime loss to Nevada.[11] He was named to the Third Team All-Mountain West as a sophomore.[12] As a junior, Mashburn led the league in scoring at 19.1 points per game and was named to the First Team All-Mountain West.[13]
In April 2024, Mashburn transferred to Temple.[14] On November 23, he scored his 2,000th point in a win against UMass.[15]