UCI, which has won three straight and 11 of its last 12, led, 4-1, after one period and was never threatened.
UC Davis, ranked No. 10 and seeded No. 2, fell to 18-13.
UC Irvine 6, UC Riverside 5
IRVINE — Freshman catcher Chris Rabago's pinch-hit single broke a 5-5 tie in the 11th inning as the host Anteaters completed a three-game Big West Conference series sweep Sunday.
Freshman catcher Jerry McClanahan was three for five with three runs batted in to pace the Anteaters' 14-hit attack, which included two hits each by D.J. Crumlich, Connor Spencer, Jeff Stephens and Christian Ramirez.
Junior Race Parmenter pitched two scoreless relief innings to earn the win for UCI (23-17, 8-7 in conference).
UCR fell to 14-23, 4-8.
SANTA BARBARA — Visiting Vanguard dropped a pair to Westmont to conclude the Golden State Athletic Conference regular season on Saturday.
The Lions lost the opener, 10-9, before falling, 8-2, in the second game.
Vanguard finished tied for fifth with Westmont and Fresno Pacific, but lost tiebreakers to both and was left out of the six-team conference tournament that begins Tuesday.
Vanguard finishes 23-21, 13-19 in conference.
VU's Michael Castello was six for eight with four runs batted in and Hank Yates was five for eight with two RBIs.
MEN'S TRACK & FIELD
Steve Scott Invitational
IRVINE — UC Irvine senior Charles Jock broke a 10-year meet record by winning the 800 meters in 1 minute, 46.59 seconds on Sunday at Anteater Stadium.
Jock bested the previous meet record of 1:46.82 set by Khadevis Robinson in 2002.
Jock also ran a 45.7 anchor leg on UCI's winning 4x400 relay that posted a season-best time of 3:09.89. Dominic Jester, Jacob Yowell and Chris Carson rounded out the relay.
Yowell was fifth in the 110 hurdles in 14.12 seconds and Stephen Brown was fourth in the pole vault with a clearance of 15 feet, 7 inches.
UCI's Tommy Newton-Neal was sixth in the 1,500 in 3:51.44.
Long Beach State 4,
UC Irvine 1