De'End Parker scored 23 points, Chris Adams and Avry Holmes added 17 apiece, and San Francisco came alive in the second half to rally past BYU 99-87 on Saturday night.
The Dons (11-13, 4-7 West Coast) shot 57 percent from the floor, including 72 percent after halftime, and were 14 of 23 from 3-point range — 9 of 10 in the second half.
Brock Zylstra had 18 points for the Cougars (18-8, 8-4), and conference scoring leader Tyler Haws chipped in 16.
BYU led 48-39 at halftime and 62-47 after Matt Carlino's jumper with 14:25 to play, but San Francisco came alive after that, outscoring the Cougars 52-25 the rest of the way. Holmes' 3-pointer with 5:56 left put the Dons ahead for good, 75-72, and San Francisco went on to lead by as many as 16.
With the win, San Francisco avenged January's 80-76 home loss to BYU.