Dyer throws six shutout innings while Zeile and Williams log two hits apiece.
UCLA to host the Lions at 6 p.m. out at Jackie Robinson Stadium.
Zeile goes 3-5 with a run and a RBI as Bruins get series-clinching victory.
Stephens and Moore log two hits, two runs and a RBI apiece to lead Bruins.
Freshman pitcher hits game-winning home run in first collegiate plate appearance