[1] In his senior season, Mann averaged 23.6 points and 4.9 rebounds per game, and was named Daily Commercial All-Area Player of the Year.

On August 28, 2018, he committed to playing college basketball for Florida over offers from Kansas, Tennessee and North Carolina.

[6] On July 7, 2020, Mann announced he was returning to Florida, in part due to the possibility to start at point guard.

[8] On March 12, 2021, he scored a career-high 30 points in a 78–66 loss to Tennessee at the SEC tournament quarterfinals.

[12] On April 9, 2023, Mann recorded his first career triple-double when he finished with 24 points, 12 rebounds and 12 assists in a win against the Memphis Grizzlies.