MORAGA, CALIF. — San Diego baseball (12-4, 1-1 WCC) was undone by three errors in its second West Coast Conference game of the season, dropping a 4-3 decision to Saint Mary's (11-8, 1-1 WCC) on Saturday afternoon at Louis Guisto Field that snapped a nine-game win streak for the Toreros.

Redshirt sophomore Conner Thurman started the game on the mound for USD and pitched a scoreless first inning before running into trouble in the second. The Gaels were able to plate three unearned runs in that frame, doing their damage by way of a pair of singles and a wild pitch following errors by shortstop Cody Jefferis and second baseman Thomas Luevano.

San Diego plated three in the fourth and fifth innings to tie the game courtesy of RBI singles from Adam Lopez and Tora Otsuka plus a throwing error by SMC, but it would get no further.

The Gaels' Nick Mistone delivered the game's decisive blow in the bottom of the sixth, plating Christian Campos with an RBI single through the right side to give his team a 4-3 advantage that it would not relinquish.

Thurman threw six innings in total, surrendering four runs (two earned) behind eight strikeouts and a walk. He took the loss for Saturday's contest, moving his record to 2-1.

He was relieved by freshman Carter Rustad, who tossed two scoreless innings with two hits and a strikeout to finish the game for the USD.

True freshman Jack Costello recorded a double and a single in Saturday's contest to extend his hit streak to 10 games. The Simi Valley, California native has now recorded eight multi-hit performances in 14 games to begin his college career, a span that has included streaks of five (3/5-3/13) and three (3/14-present) straight games with more than one hit.

The series concludes tomorrow afternoon at 12 p.m. at Louis Guisto Field.