[3] With the NCAA Division II Chaminade Silverswords, Acker saw limited action as a junior, starting three games as a guard while having an average of five points with 13.3 minutes-per-game.
[4] Despite his limited experience at a small school, Acker declared for the 2004 NBA draft as an early entrant, something that received significant attention due to his very unlikely chances of being selected.
[9] In 2013, he joined West Los Angeles College as head coach, and led a team that started with only true freshmen to an 18–9 record by his second season.
[9] In charge of defensive schemes and player development at Hawaii, he helped the team win the Big West Conference (BWC) with an appearance in the NCAA tournament in his first season.
[12][13] Starting with his second season there, Acker helped the Aztecs reach four straight NCAA tournaments, which included a 2023 appearance in the national championship.