According to The Philadelphia Inquirer, Harrison is "a clever player with a good outside shot and knack for getting to the rim.
[5] Rieger scored a career-high 19 points in his second game on November 4, 2017, a 93–84 win against Passaic County Community College.
[7] On the season, Rieger averaged 11.0 points, 6.8 rebounds, and 2.5 assists per game while shooting 43.9 percent from the field.
[5] In May 2018 it was announced that Rieger would join the Chicago Ballers of the Junior Basketball Association (JBA).
[9] In September 2018, Rieger was named to the JBA's USA Select team as one of the top 13 players in the league.