Dunn never played basketball at UT Martin because there were no formal competitive teams for women while she was a student. She played intramural sports and went on to coach in the college ranks for decades. She coached at Austin Peay, Ole Miss, Miami and Purdue. She sported a 447-257 won-loss record and a .635 winning percentage. She took teams to the NCAA Tournament seven times and the Final Four once.
She began her professional coaching career with the Portland Power in the American basketball League in 1996. She served as the head coach and general manager of the Seattle Storm of the WNBA. She was named the head coach of the Indiana Fever in 2007 and she guided the 2009 team to the Eastern Conference Championship.