La Canada's Lauren Cox strikes out 20

La Canada pitcher Lauren Cox continued her dominant season in a quarterfinal playoff win. Tim Haddock/For ESPNLA.com

La Canada pitcher Lauren Cox struck out 20 batters and tossed a one-hit, 7-0, shutout against Mary Star of the Sea in the quarterfinals of the CIF-Southern Section Division 5 softball playoffs on Thursday.

La Canada coach KC Mathews said he was not sure if Cox’s 20-strikeout performance was a school record, but he can’t imagine a pitcher striking out 21 batters in a seven-inning game.

“It’s her personal best,” Mathews said. “I don’t think we’ve ever come close to 20 strikeouts.”

Cox walked three and hit one batter.

Selina Mohr went 3-for-4 and reached on an error. She scored three runs for La Canada. Katy Lee had two hits, walked twice and scored two runs. She drove in a run on a squeeze bunt.

Catherine Horner was 2-for-5 with a double and scored a run.

Jessica Ogden drove in two runs with a double in the first inning.

La Canada will play Nipomo in the semifinals at La Canada High on Tuesday.