San Mateo County diamond briefs • Wednesday, May 13, 2026

Half Moon Bay 17, Jefferson 0

Senior right-hander Mariah Deeney went nine up and nine down to throw an abbreviated three-inning perfect games as the Cougars (5-4 PAL Lake, 10-11 overall) won at home via mercy-rule over Jefferson (0-8, 0-13). Deeney didn’t allow a ball out of the infield, totaling six strikeouts, two groundouts, and a pop out to short.

HMB needed just two big innings to take the game in hand. The Cougars sent 14 batters to the plate in the first inning to fuel an 11-run outburst, then added six runs in the second. Senior leadoff batter Sydney Sarabia paced the squad with three hits, including two doubles and four RBIs. Senior Taelor Johnson added two hits and three RBIs, and Deeney recorded a single and two RBIs.

Notre Dame-Belmont 11, Terra Nova 3

Skylar Loo went 2 for 5 with a home run and four RBIs to extend her hitting streak to 14 games, and lead Notre Dame-Belmont (6-3 PAL Ocean, 12-11-1 overall) to the win at Terra Nova (1-8, 9-12). Claire Kimball led the way with three hits, while Eliana Crespin added two hits with a triple and two RBIs.

With NDB leading 2-1 in the fourth, Crespin produced an RBI triple to get the carousel moving. NDB went on to score three in the fourth, and four more in the fifth to break it open.

Terra Nova was paced by Bonnie Baarango’s four hits, boosting her average to .511.

Mercy 18, South City 3

Fefe Alusa and Charlotte Kell each homered, as Mercy-Burlingame (10-0 PAL Lake, 21-4 overall) cranked out 18 hits to walk off with a four-inning mercy-rule home win over South City (6-3, 12-11).

Melina Antonio was one of four Bears to total three hits, with the sophomore capping her day with a two-run single to end it. Viviana Reyes added three hits with a double and four RBIs, freshman Olivia Eastburn had three hits and three RBIs, and Kathleen Graupera went 3 for 4 with a double and two RBIs.

Castilleja 4, El Camino 2

Castilleja senior Katherine Cheng fronted a four-run third by blasting a two-run home runs, as the Gators (4-5 PAL Lake, 7-9 overall) held of visiting El Camino (2-7, 5-12) for the win in Palo Alto. The Lady Colts scored both their runs in the top of the sixth. Aiyana Lopez paced El Camino with two hits, including a double and an RBI.

Baseball

Menlo 8, Sequoia 3

Trailing 3-1 in the fifth, Menlo School (8-5 PAL Bay, 17-9 overall) sent 12 batters to the plate in the sixth to erupt for a 6-spot to win at home over Sequoia (4-8, 14-11). Senior Jack Freehill tied it with a two-run triple, and then scored on an error on a pickoff throw to give the Knights the lead. Junior Matthew Majalya connected for a solo home run later in the inning, his fifth of the year.

Sophomore relief pitcher Fletcher Cahill fired four shutout innings to earn the win, allowing one hit, three walks and one hit batsman while striking out four. His record improves to 3-0 with a 1.30 ERA. Menlo sophomore William Larson paced all batters with three hits. Junior Cole Hymer went 2 for 4 to lead the Ravens, and senior Morgan Winfield added a double and an RBI.

Despite the win, third-place Menlo was eliminated for the PAL Bay Division title race by virtue of wins by first-place Burlingame and second-place Menlo-Atherton.

Burlingame 10, King’s Academy 5

Oscar Osuna Lopez totaled three hits and two RBIs, Slade Flores added three hits with a double and three runs scored, and the first-place Panthers (10-3 PAL Bay, 17-9 overall) rolled to the win at King’s Academy-Sunnyvale (7-6, 14-12) to maintain a half-game lead over Menlo-Atherton in the PAL Bay Division standings. Junior left-hander Nash Trautwein worked six innings, allowing three runs (two earned) on seven hits to earn the win, upping his record to 4-2. Casey Kirk and Brandon Kinoshita paced the Knights with two hits apiece.

While the Panthers currently maintain sole possession of first place, they are even in the loss column with second-place M-A. Burlingame can clinch no less than a shared Bay Division title with a win in Friday’s regular-season finale at home against King’s, but M-A has two games remaining, and can claim a share of the league title by winning both.