It was a record 24 hours for the Pac-12 as the conference has four teams in the Sweet 16 for the first time ever.
Oregon State advanced Sunday night and then Washington got Monday started with an upset of Maryland, 74-65. UCLA and Stanford kept the strong night for the conference going.
The conference had three teams reach the regional semifinals three times, in 1988, 1992 and 2009.
"And I was hoping for five," Stanford coach Tara VanDerveer said. "(Arizona State) played a team that in a lot of ways was a really talented team.