Matthew Dellavedova scored 19 points and Stephen Holt added 16 to lead Saint Mary's to a 78-72 victory against San Francisco on Saturday night.
Beau Levesque had 15 points and Mitchell Young 14 for the Gaels (13-4, 2-1 West Coast)
Cody Doolin had 16 points and De'End Parker 15 for the Dons (7-10, 0-4).
San Francisco had a chance to cut a 68-62 deficit to three in the final minute, but Parker's 3-point attempt from the top of the key glanced off the side of the rim. Young secured the rebound, was fouled, and made two free throws to put Saint Mary's up 70-62.
The Gaels held on, thanks to their going 8 for 8 from the free-throw line in the final 45 seconds. They were 24 for 27 for the game.
Both teams shot well, with San Francisco hitting 26 of 51 (51 percent) from the floor and Saint Mary's 25 of 50 (50 percent).