Junior Stephany LaRosa had two of the Bruins' five homers in #2 UCLA's 9-1, six-inning win over OSU.
UCLA still in contention for a share of this year's Pac-12 title.
Stephens and Moore log two hits, two runs and a RBI apiece to lead Bruins.
Trojans snap UCLA's nine-match winning streak to earn Pac-12 regular-season championship.
The fifth-seeded volleyball team will travel to UCSB to begin MPSF Tournament Play on Saturday.