OCC quarterback Mike Frank threw a six-yard touchdown pass to Tyler Duncan with 17 seconds left before halftime.
The Pirates outrushed the Olympians, 308-148.
San Diego Mesa dropped to 1-4.
— From staff reports
Vanguard 2, The Master's 1
COSTA MESA — Kevin Cornwall scored the game-winning goal for the Lions in the 77th minute to upset the No. 17-ranked team in the Golden State Athletic Conference opener Saturday.
Edgar Hernandez assisted on Cornwall's goal. Nikola Ilich scored in the 25th minute for Vanguard (7-3) for the game's first goal. Lions' goalie Cody Adams had three saves.
The Master's is 7-1-1.
The Master's 4, Vanguard 0
COSTA MESA — The Lions suffered their first loss of the season in the Golden State Athletic Conference opener Saturday.
Lindsey Holmankelley scored in the 10th minute and Amanda Couch scored in the 67th minute for Vanguard (8-1). Couch's goal tied the game, 2-2.
The Master's, ranked No. 15 in the NAIA, is 7-3.
Vanguard def. Hope International
COSTA MESA — Jamie Heenan had 19 kills and 14 digs to lead the No. 21-ranked Lions to a 23-25, 25-15, 25-16, 25-18 Golden State Athletic Conference win Saturday.
KaUwila Lavea had 15 kills, Alexandra Leja had 26 assists and Carly Maxwell had 24 assists for Vanguard (14-7, 3-3 in conference).
Hope International is 4-13, 0-6.
MEN'S WATER POLO
LONG BEACH — No. 7-ranked UC Irvine split a pair of games at Long Beach State Saturday.
Nick Pfeil scored three goals and Jacob Mourer added two in a 9-8 win over UC Davis Saturday morning. Pfeil scored his last goal with 6:56 left in the fourth quarter for a 9-7 lead.
In UCI's second game of the day, the 'Eaters (9-5) lost to top-ranked USC, 11-5. Mitch Wise scored a pair of third-quarter goals for UCI, which fell to the Trojans for the third consecutive Saturday.