San Marcos finished 31st at the Champions’ Invitational at the Golf Club at Terra Lago.
The Royals shot 335 on the last day of the tournament and finished with a three-round total of 963.
Servite won the team title at 891. The Friars shot 305 in the last round.
La Canada’s Colin Marikawa set an individual tournament record with a score of 197. He set the record for best single round with a 61 on the first day.
Chad Visser finished at 232 and Niels Andersen shot 235 to lead San Marcos.
“We did not play well today and I am disappointed we didn’t show what we are capable of,” San Marcos coach Aaron Solis said. “Hopefully, the team will learn from this experience and we will be a stronger team because of it. I have faith in our boys and I know we can be successful.”