[1] As a senior on December 28, 2014, Riller scored a school-record 53 points in a win over Leesburg High School in the finals of the Ocoee Great 8 tournament.

[5] Riller scored 20 points and added four steals in a 83–76 overtime victory over Northeastern in the Colonial Athletic Association Tournament.

He was named 2018 CAA Tournament Most Outstanding player and joined teammate Joe Chealey on the All-CAA First Team.

[7] On December 14, 2019, Riller became the third Cougar in program history to reach the 2,000 career point mark, scoring 21 in a road loss to Richmond.

[9] On January 16, 2020, he recorded the first-ever triple-double by a College of Charleston player, with 20 points, 10 rebounds and 10 assists in a loss to Northeastern.

Under the terms of the deal, he split time between the Hornets and their NBA G League affiliate, the Greensboro Swarm.