Bishop Diego was swept by CIF-ranked Oak Park, 25-17, 25-16, 25-19, on Thursday night.
The Cardinals are 9-9 on the season and 5-4 in the Tri-Valley League.
“We were led offensively by Will Busch and Luca Jordano,” coach Jason Donnelly said. “Mario Martinez continues to work hard and play well for us. Tonight he played all the way around and gabe us some nice play in the back row.”