Kevin Carroll had five block assists and senior Anthony Spittle chipped in 40 assists for UCI.
Northridge fell to 3-10, 2-6.
UCI plays host to Hawaii in MPSF action Monday and Tuesday at 6 p.m.
Arizona Christian 2, Vanguard 1
COSTA MESA — The visitors scored twice in the eighth inning to overcome a 1-0 deficit in the nonconference game Friday.
Vanguard had five of the game's nine hits and Brandon Young managed the lone run batted in for the Lions (4-6).
Vanguard starter Jason Dovel allowed just two hits in 7 2/3 innings to absorb the loss. He walked five and struck out six.
Arizona Christian is 8-11.
The two teams' doubleheader scheduled for today has been cancelled due to rain and will not be made up.
Riverside 68, Orange Coast 49
RIVERSIDE — Helena Robel scored 10 points to lead the Pirates in the Orange Empire Conference game Friday at Riverside Poly High.
Samantha Hansen added nine points for OCC (22-8, 9-3 in conference).
The Tigers are 17-12, 7-5.
Riverside 80, Orange Coast 60
COSTA MESA — Chris Williams scored 13 points to lead the Pirates in the Orange Empire Conference game Friday at Riverside Poly High.
Will Ligon had nine points for OCC (5-22, 1-11 in conference).
The Tigers, the OEC champions, are 19-10, 10-2.