Jorden Page and James Walker III added 12 points apiece for the Gaels (3-0), who led 37-33 at intermission before coming out of the locker room with a 16-3 run. Waldow had six points during the outburst.
Saint Mary's shot 64.3 percent (18 for 28) from the floor in the second half.
Justin Crosgile had 13 points and five assists for the Eagles (0-3).
Matthew Dellavedova had nine points, eight assists and six rebounds for Saint Mary's.
Holt made all three of his 3-point attempts, and Walker was 3 of 5 from behind the arc.
Andy Katz breaks down the likelihood of Villanova, Syracuse, North Carolina or Oklahoma making a run to the Final Four next season.
Florida State has announced that Xavier Rathan-Mayes will return to the court for his junior season. The 6-foot-4 guard declared for the NBA draft last month but did not hire an agent.
Virginia coach Tony Bennett takes the ACC Fast Break with Dino Gaudio by answering questions like who the best Tony Bennett is and what other sport he'd like to coach.