The Spartans (7-5) tallied a whopping 70-yards on penalties and gave up four turnovers.
The Wildcats (10-2) were able to turn two of those turnovers by the Spartans into touchdowns and that was all they needed as the Spartans could not overcome their own demise on the penalty side.
In the second quarter, the Wildcats recovered a fumble on the Schurr 36-yard line. Three plays later, senior running back Christian Blanco scored on a 24-yard run to take the early lead 7-0.
In the second half the Wildcats took the opening possession and drove down 72 yards and capped off the drive with a 24-yard touchdown run by senior quarterback Nick Bueno and added onto the lead, 14-0, in the third quarter.
A scary moment came in the middle of the third quarter as Spartans senior running back Abraham Gonzalez took a vicious hit by the Wildcats defense and laid on the ground for a few moments before he was taken off the field on a stretcher, but he gave the Spartans visiting sideline the thumbs up. His prognosis is unknown, officials said.
The Wildcats put the game away in the fourth quarter when Spartans senior quarterback Aaron Cantu tried to force a pass into double coverage and senior cornerback Andrew Plasencia picked him off and ran it back for an eight-yard touchdown.
The Spartans tried to make a comeback when Cantu connected with his senior receiver Chris Chiarmonte for a three-yard touchdown pass and cut into the Wildcats lead, 21-7, late in the fourth quarter.
The ensuing onside kick was not successful as the kickoff sailed out of bounds and the Wildcats ran the clock out.
The Wildcats will head on the road next Saturday to take on San Dimas in the semifinals.