Sophomore Anthony Daboub led the Bruins with two goals, including eventual game-winner.
Junior Paul Reynolds led the Bruins with a hat trick against the Gauchos.
Ryder Roberts, Chancellor Ramirez, Jack Fellner and Danny McClintick each completed hat tricks.
The Bruins will open with No. 16 Concordia at 8:00 a.m. on Sept. 21.
Sophomore Danny McClintick led the Bruins with a season-high four goals.
Freshman Ryder Roberts and junior Daniel Lenhart both had hat tricks for UCLA.
Anthony Daboub, Paul Reynolds and Alec Zwaneveld each scored hat tricks for the Bruins.
The Bruins will play three games on Saturday, Sept. 14.
UCLABruins.com recognizes the Play of the Week and the UCLA/Muscle Milk Student-Athlete of the Week
Paul Reynolds scored six goals today in a 21-7 win over Cal Lutheran and a 16-6 win over UCSD.
The Bruins beat Pomona-Pitzer (17-4) and Claremont-Mudd-Scripps (19-2) in the UCLA Invitational.
The UCLA men's water polo team will play four games (two exhibition) at Spieker Aquatics Center.