Rio Linda found Christian Brothers sophomore Haley Snyder tough to hit Tuesday in their Capital Valley Conference softball game.
Snyder struck out 18 batters and allowed two hits as the Falcons won 6-0. She threw 103 pitches and did not walk a batter.
Senior Gisselle Jimenez went three for four with two home runs to lead the Falcons' offense.
Snyder is among the section's top strikeout pitchers. She has fanned 163 in 88 innings, an average better than 1.8 per inning.
Sierra of Manteca's Allie Walljasper struck out 19 batters against Manteca April 5 and 18 against Weston Ranch of Stockton April 24.
A number of pitchers - including former Olympian and current Granite Bay coach Michele Granger - have struck out 21 batters in a seven-inning game in California through the years.
Mira Loma's Amy Windmiller did it in 1989 against Lindhurst.
Snyder's mark is impressive because high school pitchers under a new national rule were moved back from 40 to 43 feet last season.
Christian Brothers (14-9, 5-2), which is in second place in the CVC behind Casa Roble (14-4, 7-1), hosts Del Campo (12-6-1, 5-3) this afternoon, weather permitting.
Bella Vista's Jordan Becker helped tightened up the CVC race on Tuesday by beating Casa Roble 1-0 on a one-hitter. The junior struck out six and walked four.