Senior All-America Mallory DeBoom recorded two assists.
UST lost its opener on August 31, 2-0, to ranked Wheaton (Ill.). Coach Sheila McGill's team completed an 8-0 run through September play in which it outscored opponents 29-2.
Sarah Pasternak was in goal Saturday to record her team's sixth shutout of the season.
The Toms play Wednesday at St. Mary's.