Rawle Alkins had 16 points and eight rebounds for the Wildcats (22-6, 12-3 Pac-12), and Dusan Ristic scored 14 points.
Dorian Pickens added 20 points as the Cardinal (15-13, 9-6 Pac-12) kept their postseason hopes alive. Michael Humphrey added 15 points before fouling out in the final six minutes and Oscar Da Silva scored 14.
Jaylen Howell scored 18 points to lead the Huskies (18-10, 8-7 Pac-12), who lost their fourth straight to Stanford and fell to 2-6 in their last eight games.
There were five lead changes and three ties in the final 5 minutes, and Cal knotted the score at 76-all when Marcus Lee scored off a feed from Justice Sueing with 7.