Santa Rosa swept Robertson in a Monday night volleyball contest held in Santa Rosa.
Game scores were 25-11, 25-19, 25-22, in favor of the Lady Lions.
The Lady Cardinals slipped to 2-2 under first-year head coach Dominique Montoya. Santa Rosa is off to a strong start at 6-3 overall with a 2-0 record at home.
Rachele Portillo paced Robertson with 17 kills and eight service aces. Setter Kimmeah Martinez notched 47 assists.
Jaci Fulgenzi had seven digs, and Hannah Lopez two blocks to highlight the defensive effort.