Kristian Ipsen won both diving events, the only two victories Stanford recorded on a day California dominated in swimming events.
The third-ranked Golden Bears beat the host Cardinal, 169-74, Saturday in a Pac-12 Conference meet between the two remaining unbeaten teams.
Ipsen, who competed at the 2012 London Olympics in synchronized diving, won the 1-meter event with a score of 440.48.
He came back to win the 3-meter event with a score of 463.05. Connor Kuremsky placed third in the 3-meter after a second place finish in the 1-meter.
Bradley Christensen was second in the 3-meter and Noah Garcia was third in the 1-meter as the Cardinal (4-1, 7-1) swept the top three places in diving.
Stanford managed three second-place finishes in the main pool as Cal simply overpowered the Cardinal.
Max Williamson was second in the 200 IM in 1:48.47, Connor Black was runner-up in the 100 fly with a time of 47.76 and David Nolan finished the 100 back in 47.78 to place second.
Sacred Heart Prep grad Tom Kremer added a third-place finish in the 100 free in 44.73 and was fourth in the 200 free with a time of 1:37.84.
Stanford gets another shot at the Bears at the Pac-12 Conference championships, which get underway on Thursday in Federal Way, WA.
Women's water polo
Stanford opened the UC Irvine Invitational with an 11-3 victory over Pacific as Anna Yelizarova, Ashley Grossman and Kaley Dodson each scored twice.
M-A grad Becca Dorst started and made a pair of saves in the first half.
The Cardinal (9-0) followed with an 11-10 win over Arizona State in the second game of the day. Dodson scored four goals.
Zach Hoffpauir had two hits and drove in two runs but Stanford fell to host Texas, 4-3, in a nonconference game Saturday.
Marcus Brakeman threw a wild pitch with the bases loaded and two outs in the bottom of the ninth, allowing the winning run to score.
Alex Blandino, Alex Dunlap and Austin Slater each added two hits for the Cardinal (2-4).
Stanford starter Brett Hanewich went 5 1/3 innings, allowing two runs -- one earned -- on four hits.
Brakeman did not allow a hit in his 1 2/3 innings but walked the bases loaded in the ninth before unleashing his wild pitch.
Blandino doubled home a run in the eighth to tie the score at 3-3.
LSU scored three runs in the top of the seventh inning to record a 5-3 come-from-behind victory over Stanford at the Mary Nutter Classic in Cathedral City on Saturday.
Jessica Plaza hit a home run and Leah White and Kayla Bonstrom each drove in runs for the Cardinal (13-2), which plays Syracuse and No. 2 Tennessee on Sunday.
Stanford lost its second straight after opening the season with 13 consecutive victories, the second best start in program history to a 15-game winning streak to open the 2008 season.
Freshman Madi Schreyer suffered her first collegiate loss after winning her first 10 decisions.
Serena Fagan, Bailey Bondy and Alexandra Huchro each won matches but Stanford fell, 6-3, to Cornell in a consolation match of the Howe Cup at Princeton on Saturday.
The Cardinal (6-8) plays Dartmouth (5-9) for seventh place on Sunday.