Second-ranked Buchanan blasted five home runs, including two by Chris Rodgers, in a 22-2 battering of No. 6 Central.
Trevor Ellison hit a grand slam and finished with six RBIs, leading Memorial over Madera South 16-9.
Jacob Enas pitched a three-hitter as El Diamante topped Redwood 7-0.
Nicole Simoni had four hits, scored four runs and stole four bases to lead El Diamante over Redwood 9-1.
Serena Sanchez tossed a five-hitter and went 2 for 3 at the plate in Sanger's 5-0 shutout of Clovis North.
Mariah Chavez drove in five runs and scored four in Dinuba's 16-4 thrashing of Coalinga.