It has been 3,647 days since Archbishop Mitty girls basketball lost a game in West Catholic Athletic League play.

That 10-year streak reached 100 consecutive wins on Friday against St. Ignatius. Tuesday, the Monarchs were back home in San Jose to welcome in Archbishop Riordan on senior night.

The Crusaders had played Mitty tougher than any other WCAL team this season, losing by 14 points in San Francisco on Jan. 21. And after a half on Tuesday, Riordan only trailed by eight.

Then Mitty showcased why it hasn’t lost a WCAL matchup in a decade. The Monarchs exploded out of the halftime break, mounting a 21-0 run to blitz past Riordan.

The Crusaders couldn’t stop the oncoming onslaught, and Mitty — ranked No. 1 by the Bay Area News Group — controlled the rest of the game to cruise to a 71-50 win.

“Coach (Sue) Phillips is a phenomenal coach,” Riordan coach Will Watkins said. “She made an adjustment, and we didn’t adjust well enough to it. So that’s pretty much the biggest thing. We’ve got to be able to make better decisions there against the pressure.”

Seventh-ranked Riordan (15-7, 6-4 WCAL) handled Mitty’s full-court press well enough in the first half after an 8-0 start that gave Mitty an early lead. But the Monarchs (19-3, 10-0) turned up the heat in the third quarter and caused the Crusaders to turn the ball over in bunches.

“I didn’t think we were playing with a level of intensity or ball pressure that we needed to beat a team like Riordan,” Phillips said of her Mitty squad. “So we picked up the defensive pressure and changed up our schemes a little bit and turned them over. Made some difficult shots. We also got out in transition, which was big. Shot the ball at a higher clip as well.”

Mitty pressured Riordan constantly, and the Crusaders started to give way midway through the third. After scoring on their second possession of the quarter, Riordan then faced down a nearly nine-minute scoring drought while the Monarchs took advantage of several steals to get easy buckets in transition.

“We got handfuls of stops in a row, so that was great,” Phillips said. “Unfortunately (in the first half), it looked like more of a containment press than speeding somebody up for us. So we started to do that and really made them stretch their offense, extend their passes, try to enter their offense further away from the basket and make them take contested shots. So that did the job.”

No. 12 St. Ignatius 50, No. 9 St. Francis 45 >> SI pulled out a close league battle over St. Francis at home in the City on Tuesday. The Wildcats (13-9, 6-4 WCAL) led 28-25 at the half and just 35-34 after three quarters. The Cats won the fourth 15-11 to secure the victory. St. Francis dropped to 17-6 overall and 6-5 in the WCAL. SI sits in a tie for second in the league standings with Riordan, trailing only Mitty. The Wildcats beat Riordan 55-49 on the road in their first meeting and play the Crusaders again at SI next Tuesday. The Lancers are alone in fourth place in the WCAL.

Dougherty Valley 60, Monte Vista 47 >> Junior guard Keira Tom scored a game-high 24 points and dished out four assists to lead Dougherty Valley past Monte Vista in the second round of the EBAL playoffs. Sophomore Juliette Leonard totaled 18 points and Naliyah Sefidi had 15 for Monte Vista, which dropped to 12-15, 4-6. Dougherty Valley (17-9, 4-5) traveled to California on Wednesday.

Boys basketball

No. 1 Archbishop Riordan 65, Archbishop Mitty 40 >> Riordan held a 36-9 lead at halftime and didn’t let up as the Crusaders cruised to their 12th straight win with a 25-point rout of Mitty at home in WCAL play. Riordan improved to 21-1, 12-0. Mitty fell to 12-11, 4-8.

No. 10 St. Ignatius 50, St. Francis 29 >> The Wildcats got scoring from everywhere on Tuesday as they blew out St. Francis for their fifth straight win. Vince Crisp, Ty Landers and Raymond Whitley each had nine points for St. Ignatius, which improved to 16-5, 9-2 WCAL. St. Francis is 7-15, 2-10.

No. 13 Valley Christian 71, Sacred Heart Cathedral 47 >> Valley Christian had no trouble with SHC in the City. Bryant Clark led the way for VC (17-5, 8-4 WCAL) with 28 points, followed by Brayden Harris with nine points. Hudson Dennison and Justin Hampton added eight apiece for the Warriors. SHC slipped to 9-13, 2-10.

Monte Vista 49, Amador Valley 45 >> In a defensive slugfest, the Mustangs (17-10) pulled out a win over Amador Valley (19-9) at home to advance to the third round of the East Bay Athletic League playoffs. Monte Vista visited California on Wednesday. Center Gavin McMillan had 10 points, nine rebounds and four blocked shots as Monte Vista’s defensive anchor. Sophomore Ian Desai had a team-high 11 points and Chase Simpelo totaled eight.

Serra 73, No. 20 Bellarmine 70 >> Serra overcame a 13-point deficit and Ryan Rice hit the go-ahead 3 in overtime to defeat Bellarmine on the road. Serra senior Mikey Ballout had a game-high 24 points, which included four 3s. Sebastian Margate added 16 points and six assists. Serra (13-9, 4-8 WCAL) will host St. Francis on Friday. Bellarmine dropped to 15-7, 6-6.

Menlo 82, Crystal Springs Uplands 43 >> The Knights snapped their three-game losing streak by routing Crystal Springs Uplands on the road. Menlo junior Ethan Zhao finished with 24 points, eight rebounds and three steals. Jay’Ar Davis had 17 points and Aidan Stull filled the stat sheet with 10 points, seven assists, eight rebounds and three steals. Menlo improved to 14-9, 4-5 West Bay Athletic League. Crystal Springs dropped to 8-13, 2-7.

Mt. Eden 64, Encinal 47 >> The dynamic duo of Johnson Tran and Lorenzo Jackson led Mt. Eden to its fourth straight victory. Tran had a game-high 22 points and Jackson added 19 for Mt. Eden (15-9, 8-1), which is in full control of first place in the West Alameda County Conference Shoreline Division. Adam Elmouhtaj had 11 points and Roma Funes scored 10 for Encinal, which dropped to 9-13, 3-6.