California drew within 43-42 with 13:20 left to play on a Crabbe jumper but the Cardinal eventually rebuilt its lead to 10 points.
Gage hit one of his three 3-pointers with 7:07 remaining to play in the first half to put the Cardinal ahead.
Crabbe, the Pac-12's leading scorer, was limited to four shots in the first half.
Mike Brey is looking at former Notre Dame players to fill two assistant jobs that have opened up with the departures of Martin Ingelsby and Anthony Solomon.
Purdue's 2016-17 prospects got a jolt Wednesday when forward Caleb Swanigan announced he will return for his sophomore season.
Clemson's Jaron Blossomgame says he is withdrawing from the NBA draft and returning to school for a final season.