Brennan was a volunteer assistant coach at Columbia University for one year then served as an assistant coach for Princeton University from 2000 to 2007. After being the assistant coach of Princeton, he became the assistant coach of AU from 2007 to 2009. The next four years he served as an assistant coach for Georgetown University. His overall record as an assistant coach was 252–163.
Head coaching career
Brennan was named the head coach of AU in April 2013.[6] In his first season with the Eagles, Brennan led them to a second place regular-season finish in the Patriot League, a Championship in the Patriot League Tournament, and a bid to the 2014 NCAA Tournament after being picked to finish just ninth in the Patriot League in the preseason poll. He was named 2014 Patriot League Coach of the Year based on this turnaround.[7] On March 9, 2023, Brennan was fired following a March 5 double overtime loss in Patriot League semifinals.[8]
National champion
Postseason invitational champion
Conference regular season champion
Conference regular season and conference tournament champion
Division regular season champion
Division regular season and conference tournament champion
Conference tournament champion