Williams' 3-pointer got UC Santa Barbara within 71-68 with 1:36 remaining. But after a Jennings dunk at the other end, Williams missed two free throws, and the Gauchos missed three of their last four shots from the floor.
Malik Newman, who had widely been considered a one-and-done player, has chosen to transfer to Kansas to continue his college career.
Avery Johnson's first season as a college coach was a success by most measures, and he'll aim to keep the Crimson Tide rolling in the right direction.
Gonzaga has signed California transfer Jordan Mathews to a financial aid agreement for the 2016-17 season.