The offensive machine that is second-ranked Archbishop Riordan revved its engines early Friday night and kept on rolling against inner-city rival Sacred Heart Cathedral.

SEC-bound quarterback Michael Mitchell completed his first two passes for touchdowns and finished with four scores on 348 yards passing as the Crusaders cruised to a 56-30 win over the Fighting Irish in a West Catholic Athletic League game at Kezar Stadium.

Mitchell, who is off to Vanderbilt after this season, got to hold the Stanfel Cup trophy one last time as he and his teammates serenaded the visiting fans. Riordan (5-0, 2-0) claimed its third straight win over SHC (3-2, 1-1) — all by 20-plus points — though it still trails the series since 2004, 12-11.

Riordan left no doubt against SHC after going up early on its past two opponents and allowing them to hang around.

“We talked about finishing,” coach Adhir Ravipati said. “My whole thing with the kids is just playing four quarters of clean football. We’ve got to get to that point if we want to be an elite team. ... We still have a lot of room to grow.”

No. 4 Acalanes 51, Benicia 25: The Dons put up another high-scoring performance as Tyler Winkles completed 15 of 23 passes for 298 yards and two touchdowns. Senior Deonte Littlejohn rushed for 84 yards and two touchdowns while Josh Elerts carried 11 times for 73 yards and two scores. Finley Rivera caught three passes for 77 yards and a touchdown as Acalanes improved to 6-0. Benicia dropped to 2-4.

No. 6 San Ramon Valley 49, Granada 13: Owen Power’s 30-yard interception return for a touchdown set the tone as SRV routed visiting Granada. Quarterback Cole Dawes had five touchdown passes to five receivers. Power added a 10-yard rushing score. SRV (4-2) will begin East Bay Athletic League Mountain Division play next week at Amador Valley. Granada dropped to 3-3.

No. 7 California 40, Livermore 22: Luke Taylor remains on a roll for California as the Grizzlies’ all-purpose player scored three touchdowns against previously unbeaten Livermore. Taylor caught two TD passes and ran one in for Cal, which is 6-0. Arjun Banerjee ran in a TD and threw for two scores. Jordan Lee had a rushing TD, and Henry Dupin returned an interception for a touchdown. Livermore fell to 5-1.

No. 10 Archbishop Mitty 32, No. 12 Valley Christian 7: Mitty stretched its winning streak to four games as Joseph Engin passed for two touchdowns and ran for one to lead the Monarchs over Valley Christian in a WCAL game at Foothill College. Engin threw an 11-yard TD pass to Marquis Marshall and a 7-yard scoring pass to Kai Sniffen. Lazaro Faraj-Washington’s 6-yard run capped the scoring for Mitty (4-1, 2-0), which also had field goals by Chase Graff from 53 and 32 yards. Graff also contributed eight tackles, including a sack. Valley fell to 2-3, 0-2.

No. 11 Campolindo 35, Alhambra 6: Campolindo scored the first 28 points, rolling to a nonleague victory at home over Alhambra to improve to 5-0. Everett Zellmer (12-yard reception), Jacob Gocobachi (5-yard dive), Rai Marchetti (21-yard catch) and Ryan Erickson (5-yard catch) scored first-half touchdowns for Campo. Colton Nakano’s TD reception in the third quarter cut the margin to 28-6 for Alhambra (2-3). Erickson’s 62-yard jet sweep completed the scoring.

No. 20 Salesian 51, Ygnacio Valley 8: Sophomore Izeah Buchanan threw two long touchdown passes, one apiece to Carlton Perrilliat and Joseph Tarin in the first quarter to set the tone for Salesian’s rout. Four running backs scored touchdowns for the Pride as longtime coach Chad Nightengale subbed in his JV and deep varsity reserves by the middle of the second quarter. Salesian (5-0) led 37-0 at halftime. Ygnacio Valley is 0-5.

No. 22 Wilcox 49, Capuchino 0: Wilcox got three touchdowns from Santino Barragon, two on the ground and one on a fumble return, to improve to 3-2. Jeremiah Arevalos added another defensive score, returning an interception for a TD. Freshman Myles Cheney caught three passes and scored on one. QB Kai Imahara ran in a TD and threw another to Cheney. Capuchino fell to 1-4.

Amador Valley 17, Dublin 14: Eliot De La Torre kicked a 47-yard field goal with less than a minute left to lift Amador Valley to a victory at home over Dublin. The Dons held a 14-3 lead at halftime, but Dublin stormed back with three points in the third quarter and eight in the fourth. Andre Armendariz’s 1-yard rushing touchdown and a two-point conversion tied the score with eight minutes left. With a minute left, Amador Valley marched down the field to give De La Torre a chance to win it. The senior delivered. Amador Valley is 2-4. Dublin slipped to 3-3.

James Logan 24, Moreau Catholic 19: Sophomore Jeramiyah Cotton ran for the go-ahead touchdown and had an interception, and junior linebacker Teddy Gaoteote had numerous tackles and an interception to lead James Logan to a win over host Moreau Catholic in West Alameda County Conference Foothill Division play. Xavier Garcia added a receiving touchdown and Steven Swamy ran for a TD as Logan improved to 4-2, 2-0. For Moreau (1-5, 0-2), AJ Jackson scored on an 80-yard kickoff return, Seth Evans had two rushing touchdowns and Lance Mitchell contributed two sacks and a forced fumble.

Leland 15, Oak Grove 14: Trailing 14-0 in the fourth quarter, Leland mounted a stirring comeback to steal this one on the road. Sam McFarland cut into the deficit with a 5-yard TD run, then Ian Qi scored a two-point conversion to make it 14-8. With four minutes to play, Cole Markos caught a TD pass on a deep ball from Phil Arsintescu. David Ahlgren converted the game-winning PAT for the Chargers (1-4). Oak Grove is 0-5.

Miramonte 38, College Park 14: Used as only a kicker last season, Miramonte senior James Rogers told his coaches he could do more for the team this year. Friday, he intercepted three passes, was on the receiving end of two touchdown passes and kicked a 43-yard field goal that was partially blocked to lead Miramonte to a nonleague victory at College Park. Miramonte improved to 4-2. College Park is 1-5.

Mountain View 35, Carlmont 28: Dom Kristof rushed for four touchdowns and more than 200 yards to lead the Spartans. Sam Ford also scored on the ground. Trailing 14-0, Carlmont responded with three touchdowns to take a 21-14 lead before Mountain View responded late. Brody Zirelli threw three touchdown passes for the Scots, to Lucas Robertson, Dylan Sorensen and Austin Sotto. Ethan Vo and Micah Perkins had interceptions for Mountain View (2-3, 1-0 PAL De Anza). Carlmont fell to 1-4, 0-1.

Silver Creek 17, Gilroy 7: Senior Jordan Thompson rushed for 133 yards and two touchdowns to lead the Raiders to a win on the road over Gilroy. Silver Creek (3-2) rushed for 260 yards as a team, with seven runners touching the ball. Gilroy dropped to 1-4.

Evan Webeck, Nathan Canilao, Christian Babcock, Darren Sabedra and Glenn Reeves contributed to this report