Miller was named Head Coach at USC and coached two seasons (1993–95). Her teams had a combined 42–14 record and went to the NCAA tournament both seasons, making a Regional Final once. She then coached for four seasons (1997–2000) with the Phoenix Mercury of the WNBA, where she also served as general manager. "Run, run, run, run, run," Miller said about her kind of team. "Play some outstanding defense. I want this team to be physical, I want them to know the game." In 1998, Miller coached the Mercury to a 16–12 record and to the WNBA Finals, where her team lost to the Houston Comets. She resigned after the 2000 season, citing fatigue.