San Marcos began its Channel League schedule on Wednesday with a 15-6 victory over Buena.
George Kuesis scored five goals and Miles Cole had three. Six other Royals scored, including two from Felipe Carsalade off the bench. Kuesis added three assists and spearheaded an effective counter-attack for San Marcos.
After a 2-1 first quarter, San Marcos widened their advantage considerably in the second quarter and took an 8-2 lead into the break.
San Marcos (6-4, 1-0) travels to the Villa Park Tournament on Friday and Saturday.