Nick Hoover tossed 3 2/3 innings of scoreless, one-hit relief to earn the win, taking over for starter Matt Summers, who yielded six hits and four runs, two earned, in 4 1/3.
UCI scored four in the first and Summers had an 8-3 lead going into the fifth.
Crumlich is now hitting .451, while Hillman is batting .447. Fox is hitting .418.
UCI (10-1), ranked No. 18 in the USA Today/ ESPN poll, plays host to the Hornets today at 2 p.m.
UC Irvine 5, Sacramento State 2
IRVINE — Becka Kwan and Courtney Byron won in singles and doubles to help the host Anteaters win the nonconference match Friday.
It was the fourth straight win, the second straight over a top-40-ranked team, for the Anteaters (6-7).
Kwan won at No. 2 singles, 6-1, 6-1, and teamed with Holladay to earn the Anteaters' lone doubles triumph in the No. 1 spot.
Holladay won at No. 6 singles, 6-1, 6-2. Courtney Byron (No. 1), Kristina Smith (No. 3) and Franziska Goettsching (No. 4) also had singles wins.
COSTA MESA — The host Lions earned a split against nonconference visitor Holy Names on Friday.
Vanguard won the second game, 6-4, scoring single runs in the fifth and sixth innings to break a 4-4 tie in the seven-inning contest.
Kaysie Flasck and Kari Bergerson had two hits each for the Lions (11-8), for whom Elizabeth Archer drove in two runs.
Holy Names (7-8) scored in the eight inning to claim a 1-0 opening-game triumph.
Vanguard pitcher Stacie Salazar struck out 11, allowed four hits and no earned runs to take the hard-luck loss.
WOMEN'S WATER POLO
POMONA — UC Irvine defeated Redlands, 17-6, and Pomona-Pitzer, 18-4, in its two matches Friday.
Danielle Warde had three goals in each victory for UCI (10-6).