Rachel Mercik scored off an assist by Kaitlyn Fitzpatrick on a broken play at the end of the first overtime, and Cal shocked No. 10 Stanford 1-0 on Wednesday night in the Pac-12 women's soccer finale in front of a crowd of 1,455 at Cagan Stadium.
The Cardinal (13-5-1, 6-5 Pac-12) outshot the Bears 27-11 but couldn't beat Cal goalkeeper Emily Kruger.
It was Cal's first victory over Stanford in six years and gives the Bears (11-4-5, 4-4-3) hope of reaching the NCAA tournament. The 64-team field will be announced Monday.
Stanford, which had three shots hit the crossbar in the first half, ended the regular season on a two-game losing streak. Cal won for only the second time in eight games.
The Spartans scored the first 10 points.
"We got better tonight defensively. We looked more relaxed," coach Dave Wojcik said. The Spartans open the regular season Tuesday night at Santa Clara.
The Earthquakes' Victor Bernardez and Marvin Chavez were called to the Honduran national team for upcoming games against Brazil and Ecuador.
Honduras plays 2014 World Cup hosts Brazil on Nov. 16 in Miami and Ecuador on Nov. 19 in Houston.
Bernardez helped Honduras advance to the World Cup after starting nine of 10 games in the final stage of CONCACAF qualifying games. Chavez has 38 caps for Honduras.
The San Francisco Bulls lost 2-0 to Ontario, finishing their road trip 2-5-1-0. J.P. Anderson stopped 23 of 24 shots for the Bulls, whose home opener is Friday against Bakersfield.
Staff writer Elliott Almond contributed to this report.