Kellie Fox singled to score B.B. Bates in the bottom of the seventh inning, giving UCLA a walk-off, 5-4 win against Loyola Marymount at Easton Stadium on Wednesday.
Bates had four hits and scored three times for the sixth-ranked Bruins (27-5).
LMU took a 4-3 lead on Kelly Sarginson's grand slam in the sixth. But Katie Schroeder, Bates and GiOnna DiSalvatore each singled to start the seventh, tying things up before Fox's game-winner two batters later.
UCLA, tied atop the Pac-10 Conference standings at 3-0, host 13th-ranked Stanford for three games beginning on Friday at 7 p.m.