San Marcos remained undefeated in Channel League play with a 15-6 victory over Santa Barbara in the last regular season home game.
Senior Jack Hughes scored three goals, including the first goal 45 seconds into the game, assisted by senior captain Evan Lehman. Lehman, who leads the team in points, had five assists and a goal for six points.
Jack Weibe also had three goals for the Royals, and freshman Eli Heinz had two.
Taj Fedderbush led the Dons with three goals.
San Marcos coach Rick Lehman credited the senior defense, with goalie Korey Becker, Jack Strand, Jackson Kelly and Owen Williams, as they held the Dons to two goals in the first half.
The Royals are closing in on their sixth Channel League title in a row and face Cate on Tuesday. They are 7-0 in league play and 7-1 overall.