Brad Wadlow and Mitchell Young added 11 points each for the Gaels.
The game was over in a hurry. Dellavedova hit two 3-pointers as Saint Mary's jumped to a 10-0 lead, and the Gaels led 18-3 after five minutes.
Sonoma State cut the deficit to 11 later in the first half, but that's as close as it got. The Gaels were up 48-24 at intermission and led by 30 in the second half.
Wadlow had seven rebounds.
Chattanooga men's basketball coach Matt McCall has received a two-year contract extension after leading the Mocs to an NCAA tournament appearance in his debut season.
North Carolina men's basketball coach Roy Williams joins Seth Greenberg for Fast Break to discuss his favorite pregame meal, how he picks his game-day outfit and what CDs (gasp!) he has in his car.
Russillo & Kanell predict whether Ezekiel Elliott or Ben Simmons will make more of an impact during their rookie seasons.