Freshman Ryan Boselo worked four strong innings in his collegiate debut to collect the win. The Estancia High product surrendered just one hit and struck out three.
"He did an outstanding job," Altobelli said of Boselo, who was followed by fellow freshmen Jed Vandernaald (two hits allowed in two innings), Conor Schmidt (one hit in one inning) and Mark DeFrenza (two hits in two innings), another Estancia alumnus.
"Our guys threw strikes and worked out of trouble," Altobelli said after OCC pitchers left seven of the 10 stranded runners in scoring position, four at third base.
OCC pitchers struck out seven and benefited from three double plays and one caught stealing, to help overcome four walks, two hit batters and two errors.
It was only the second home shutout in just over four years for the Pirates, who last posted a goose egg at Wendell Pickens Field against Irvine Valley on April 30, 2009.
OCC had just one hit through five innings — a Brian Garza home run in the fourth — off Vikings' starter Matt Padilla.
But freshman left fielder Chris Carlson singled with one out and, after a walk, Garza doubled in Carlson to chase Padilla in a two-run sixth.
OCC tacked on five more runs in the seventh and one in the eighth, following an early season pattern in which they have outscored foes, 17-3, after the sixth inning. OCC trailed or was tied after six in its first three wins, all at Cuesta, but had no such worries Tuesday.
Garza, a freshman first baseman, finished three for four and is now eight for 15 this season (.533).
Freshman catcher Trent Woodward was two for three with a double and one run batted in, while sophomore center fielder Kevin Cho also had two hits and an RBI after opening the season just one for his first 14.