In basketball, sometimes it doesn’t matter how you start, but how you finish.

This was the case for sixth-ranked New Mission, which was able to overcome 14 first-half turnovers to defeat No. 9 Brighton, 78-70, on Friday night at Madison Park High School.

The key was a second-half surge led by senior Alexander Delarosa, who scored 12 of his 17 points in the final two quarters, as New Mission committed no more than five second-half turnovers.

“It is pathetic when you are a team of all guards and you are turning the ball over 14 times,’’ New Mission coach Cory McCarthy said. “Although we won the game I am absolutely furious with my team right now.’’

New Mission (5-2) seemed a bit uneasy against the Brighton pressure in the first half. The Titans were able to keep the game close and only trailed by 1 at the half.

“All we had to do in the first half was to maintain them. Stay with them, stay within 2 or 3 points and that’s what we did,’’ New Mission senior point guard Charlie Mitchell said.

The Titans came out in the third quarter leaning on the 6-foot-2-inch Delarosa. A jumper by New Mission senior Charles Mitchell halfway through the third quarter gave them the lead and they never looked back.

Brighton (3-2) trimmed the lead to 2 early in the fourth quarter on a transition 3-pointer by junior Mykel Derring (18 points). But Charles Mitchell answered with a transition three of his own on the ensuing possession for New Mission.

The Bengals were within a point with just under four minutes to play, but fast-break layups by senior Daeshawn McLaughlin and Charlie Mitchell kept Brighton at bay. McLaughlin added the dagger with 7 straight points in the final minute and senior Darren Tsagaroulis finished the game with a double-double for New Mission, collecting 16 points and 12 rebounds.

Cathedral 76, Tech Boston 68 — The visiting Bears (5-1) closed within 4 with 34.1 seconds left, but Cathedral senior Calvin Cheek (21 points) dribbled through triple coverage, drew a foul and drained both free throws to secure the win. Cheek scored 10 points in the first half, combined with strong rebounding to help the Panthers (7-2) jump to a 37-24 lead at the half.

Newton North 61, Framingham 49 — Ethan Wright scored 23 points as the fifth-ranked Tigers (5-1) presented 16-year coach Paul Connolly with his 300th win."We've had great kids. Really talented kids, who have really bought into the program,’’ said Connolly. ‘‘It was nice, we had some former players in attendance, which made it special.’’

BC High 74, Charlestown 41 — Senior guard Carl Pierre had 23 points for BC High.

Durfee 82, Stoughton 57 — Sophomore Tyshaun Lopes finished with 17 points for the host Hilltoppers (5-3).

Roxbury Latin 49, Dexter 23 — Senior point guard Myles Davis delivered 16 points for Roxbury Latin (3-4).

Medway 60, Dover-Sherborn 38 — Senior Andrew Tiernan (14 points) powered the visiting Mustangs (7-1).

Millis 58, Norton 44 — Junior guard Bryce Latosek had 18 points and knocked down five 3-pointers.

Rockland 55, Cohasset 40 — Junior guard Chase Bomeisler (14 points) led the visiting Clippers.

Greater Lowell 58, Mystic Valley 55 — Senior center Ian Mirumiru (20 points, 24 rebounds) was immense for the Gryphons.

Cardinal Spellman 71, St. Mary’s 66 — Junior forwards Mike Spencer (21 points) and Tyrone McCray (15 points) were the top scores for the Cardinals (5-1).

Medfield 70, Holliston 56 — Senior guard Jack Fitzgerald (17 points) led the Big Blue (5-3) to the win over previously unbeaten Holliston.

Quincy 74, Silver Lake 62 — Senior guard Ugo Kamalu (21 points) paced the President while senior guard Rob Ventola scored a game-high 32 for Silver Lake.

Case 58, Fairhaven 39 — Junior forward Drew Plante (17 points) and sophomore guard Jake Monteiro (15 points) had strong performances for the Cardinals (5-1).

Wareham 73, Dighton-Rehoboth 53 — Senior forward Jovahn Thomas racked up 27 points for the Vikings (5-4).

Pembroke 65, Plymouth South 63 — Senior Charlie Considine tossed in 17 points in the second half to hold off the host Panthers.

Natick 70, Norwood 40 — Senior Chris Cardosa had 16 points for the Redhawks (5-1).

North Reading 81, Amesbury 59 — Seniors Mike McCauley (19 points) and Shawn Tilton (16) led the Hornets (4-1).

Austin Prep 63, Saint Joseph Prep 30 — Junior Stephen Reddy had 23 and classmate Dennis Taylor added 21 for the Cougars (3-2).

Winchester 71, Lexington 69 — Junior guard Liam Fitzpatrick (18 points) hit the game-winning layup with one second remaining in double overtime for the Sachems (4-3). Junior forward Patrick Grassey (11 points) had a 3-pointer to send the game into double overtime and senior guard Brennan Clark added 16 points.

Canton 60, North Attleborough 58 — Sophomore guard Devin Foster (27 points) hit a go-ahead layup for the Bulldogs (3-3) with three seconds remaining.

Triton 61, Georgetown 49 — Junior forward Will Parsons (23 points) buried four of his five 3-point attempts and senior forward Jack McCarthy added 16 points.

St. John’s Prep 72, Malden Catholic 71 — Brett McNiff converted a layup in the final minute and Matt Relihan had 16 points for Prep.

Falmouth 56, Sandwich 48 — Senior Nick Crocker led the Clippers (3-1) with 26 points. Dylan DeBettencourt had 15 points for Sandwich.

Needham 69, Braintree 48 — Needham junior guard Thomas Shaughnessy had a team-high 24 points and contributed six assists, and five steals. Junior Brandon Monheimer added 16 points.

Walpole 58, Dedham 51 — Junior Dylan Cosky scored 10 points and grabbed five rebounds for the host Rebels (3-4). Senior Brian Sandstrom scored all 9 of his points in the final frame to hold off the visiting Marauders.

Lynn Classical 80, Winthrop 52 — Sophomore guard Jaylen Johnson poured in a team-high 30 points for the Rams (7-2).

Milford 56, Stoughton 50— The Scarlet Hawks (4-3) were led by senior Zack Tamangni (17 points) and junior Kayden Kelley (17 points, 13 rebounds).

Hamilton-Wenham 58, Masconomet 52 — Junior forward James Lustig (15 points) and senior forward Nick DiMarino (13 points) led the Generals (7-0).

Brookline 75, Weymouth 72 — Trailing by double digits in the second half, the host Warriors (5-1) relied on sophomore Chris Camille (24 points) to take the lead with less than three minutes to play.

Marblehead 55, Revere 51 — Senior captain Patrick Bugler’s 22 points helped the visiting Magicians (7-2) hold off the host Patriots. Junior Deonte Barnes registered 11 points off the bench for the visitors.

Arlington Catholic 49, Archbishop Williams 35 — Junior Spencer Sullivan scored 23 points for the Cougars (1-5).

Pope John 54, St. Clement 49 — Senior forward Christian Hebert (18 points, 15 rebounds) had a strong performance for the Tigers (4-2).

Northeast 64, Essex Tech 60 — Senior classmates Nick Bettiglio (10 points, 22 rebounds) and Scott Peary (16 points) both scored in double digits to hold off the host Hawks.

Whitman-Hanson 69, Plymouth North 61 — Senior captain Luke Tamulevich (27 points), and Nikko Raftes (24 points) led the Panthers (5-2).

Arlington 56, Reading 42 — Senior Colin McNamara scored 16 points and dished out six assists and grabbed six rebounds for the visiting Spy Ponders (6-0).

Salem 58, Danvers 57 — Junior guard Ethan Espinal (22 points) knocked down five 3-pointers in the fourth quarter, including the winner with 1.2 seconds left.

Franklin 75, Oliver Ames 42 — Junior forward Connor Peterson posted 14 points for Franklin, and senior forward Josh Macchi contributed 13 points and 14 rebounds.

Hingham 60, Duxbury 55 — Senior forward Conor Lowther tossed in 16 points for the Harbormen (3-3).

Attleboro 68, King Philip 49 — Senior guard Andrew Milliken (21 points) led the Bombadiers while senior forward Jake Dunkley chipped in with 14 points, 10 rebounds and seven assists.

Middleborough 52, Hull 50 — Junior guard Chris Dupuis (13 points, seven assists) and senior forward Jason Bean (10 points, 10 rebounds) led the Sachems (2-5).

Somerville 48, Malden 47 — Junior point guard Lucas St. Jean scored a team-best 16 points for the Highlanders (4-3).

Peabody 70, Swampscott 44 — Senior guard Junior Estrella (16 points) and sophomore guard Chris Camela (13 points) led the Tanners (4-2).

Foxborough 75, Sharon 47 — Senior guard Mark Clagg poured in a team-high 32 points for the Warriors (3-3).

Girls’ basketball

Duxbury 35, Hingham 26 — Sophomore Caroline Curley registered a game-high nine rebounds and added 8 points for the Dragons. Junior Alli Cavallo also scored 8 and grabbed five boards. Senior Siobhan Tierney chipped in with seven rebounds.

Pope John 56, Mt. Alvernia 54 — Katherine Haidul (27 points) and Kylie Paulding (13 points) each netted career highs for the Tigers (4-3), who erased a 12-point fourth-quarter deficit.

Beaver Country Day 69, Lexington Christian 47 — Wellesley’s Maddie Mullin paced BCD with a game-high 23 points.

Diman 41, Southeastern 23 — Sidney Gillis had 8 points for Southeastern.

Shawsheen 55, Chelsea 25 — Sophomore guards Rebecca Smith (15 points) and Shannon Fitzgerald (14 points) led the Rams (4-3).

Foxborough 73, Sharon 34 — Junior guard Ashley Sampson scored 19 points and junior center Shannon Smally added 13 for the Warriors (3-1).

Mansfield 62, Taunton 34 — Junior center Meg Hill (16 points, 12 rebounds, and 5 blocked shots) powered the Hornets (6-0).

Woburn 47, Belmont 34 — Senior guard Marissa Gattuso scored a team-high 23 points for the Tanners (5-0).

St. Mary’s 53, Cardinal Spellman 40 — Freshman Gabby Torres (14 points) paced the visiting Spartans (5-4) and junior Olivia Nazaire had 12.

Walpole 59, Dedham 35 — Senior guard Kelly Fogarty dropped a team-best 23 points and freshman guard Sydney Scales added 11 for the Rebels (4-2).

Old Colony 37, South Shore Voc-Tech 34 — Sara Gagne drained a go-ahead trey with under a minute remaining to lift the Cougars.

Braintree 71, Needham 33 — Senior Keelah Dixon (18 points) sank a free throw six minutes in for her 1,000th career point and junior Jenna Roche added 13 for the second-ranked Wamps (5-1).

Whitman-Hanson 49, Plymouth North 27 — Erin Leahy (12 points, seven rebounds) led the Panthers while senior captains Sarah Saccardo and Taylor McVeigh had 10 points apiece.

Dighton-Rehoboth 51, Wareham 41 — Senior Julia Campezato poured in 30 points for the visiting Falcons (5-4).

Bishop Stang 65, Durfee 40 — Rylie Carreau and Norah Markey had 18 points apiece for Stang.

Amesbury 72, North Reading 57 — Sophomore forward Flannery O'Connor (23 points) led the 7-0 Indians.

Newburyport 42, Ipswich 20 — Junior Krysta Padellaro dropped 18 points for the visiting Clippers (5-2).

Bridgewater-Raynham 57, Dartmouth 29 — Junior Shannon Lynch scored 12 points and hauled in six rebounds as the host Trojans (3-5) parlayed a 24-point second quarter into the Old Colony win. Ashley Rose and Kelly Page had 12 points apiece.

Falmouth 43, Sandwich 31 — Jenni DiCecco had 21 points, 7 steals, and 5 rebounds for the visiting Clippers (2-1).

Medfield 67, Holliston 37 — Senior forward Lauren Casieri had 15 points and eight rebounds for the Warriors.

Revere 53, Marblehead 33 — Junior Valentina Peppers dropped 19 points and grabbed 10 rebounds for the visiting Patriots (8-0).

Archbishop Williams 60, Arlington Catholic 51 — Junior point guard Asiah Dingle (30 points) and sophomore forward Monica Spain (15 points) led the Bishops (5-2).

Wayland 53, Concord-Carlisle 35 — Junior guard Darby Leid (19 points, 10 steals, 8 rebounds) and sophomore Ellery Kiefer (16 points, 6 rebounds) lifted the Warriors (4-3).

Lynn Classical 73, Winthrop 35 — Classical junior forward Paris Wilkey had a game-high 23 points.

Hopkinton 61, Bellingham 23 — Junior forward Ivy Gogolin had 23 points and 11 rebounds for the Hillers.

Bourne 41, Somerset Berkley 36 — Sophomore center Emma Fenton had 12 points, 10 rebounds, and 4 blocked shots for the Canalmen. Senior guard Tess McCarthy hit three free throws down the stretch to seal the win.

Everett 56, Medford 43 — Junior Yasmeen Guerrier dropped 19 points to lead the host Crimson Tide (2-3).

Wellesley 54, Milton 30 — Senior Dorian Cohen scored 17 points to lead the host Raiders (6-0).

Reading 42, Arlington 20 — Junior Kali Doherty (6 points) was stellar defensively for the Rockets.

Malden 45, Somerville 42 — Junior Mackenzie Furlong scored 20 points to lead the Golden Tornadoes (3-4).

Lincoln-Sudbury 50, Acton-Boxborough 47 — Junior Sofia Rosa had 14 points and nine rebounds to lead the Warriors (2-5).

Waltham 57, Boston Latin 35 — Senior captain Sophia Guerrier scored 16 points and pulled down 10 rebounds for the visiting Hawks (6-2).

Westwood 55, Ashland 29 — Junior Lizzy Kelly scored a career-high 10 points for the Wolverines (7-0).

Melrose 60, Burlington 40 — Senior center Kat Torpey (18 points, 12 rebounds) and junior guard Alexis Doherty (17 points, 13 assists) had strong performances for the Red Raiders (5-2).

Wilmington 70, Wakefield 66 — Senior guard Christina Wood scored a team-best 18 points and senior forward Haley DiLorenzo was second with 17 points for the Wildcats (4-3). The Wildcats overcame a 15-point deficit in the second half.

Saugus 48, Lynn English 43 — Senior Olivia Valente dropped 14 points and grabbed 15 rebounds for the visiting Sachems (6-1).

North Andover 48, Chelmsford 43 — Emily Sifferlen led the Golden Knights (5-3) with 22 points and eight rebounds.

Greater New Bedford 41, Old Rochester 38 — Senior forward Payton Wildrick (11 points, 12 rebounds), junior forward Sara Duarte (11 points) and sophomore guard Jayda Fortin (17 points, five steals) had strong performances for the Bears (5-1).

Peabody 47, Swampscott 38 — Senior Melissa Gray led the visiting Tanners (2-3) with 20 points while Katie Wallace (7 points, 9 rebounds, 6 assists) and Nene Onwuogu (12 rebounds, 7 points) were major contributors.

Hamilton-Wenham 46, Masconomet 42 — Senior guard Cate Blatchford (14 points), junior guard Lauren Flynn (14 rebounds) and senior guard Liz Kirschner (5 steals) led the Generals (3-3).

Andover 74, Lawrence 24 — Senior center Alyssa Casey (24 points) and sophomore point guard Taylor Landry (12 points) played sound games for the Golden Warriors (7-1).

Westport 53, Sacred Heart 15 — Laila Silver had 15 points, five steals, and five assists for the Wildcats.

Boys’ swimming

Natick 103, Xaverian 75 — Kevin Zheng (200 individual medley, 100 butterfly) and Evan Walker (50 and 100 freestyle) were double winners and Colby King qualified (diving) qualified for the Division 1 state meet to propel the host Redhawks (5-0).

Brookline 93, Wellesley 93 — Graham Harris took first in the 100- and 200 freestyle for the Raiders.

Girls’ hockey

St. Mark’s 3, Worcester Academy 0 — Senior Lexi Schumaker, junior Julianna Gong, and junior Caroline Peterson scored, while freshman Lydia Rascher recorded her first career shutout to help the host Lions blank the Hilltoppers.

Coed swimming

Shawsheen 82, Minuteman 80 — Jonathan Pinette and Tim Comu went 1-2 in the 100 breaststroke to secure the win for visiting Shawsheen in a highly competitive meet in Lexington.

Greater Lowell 97, Blue Hills 84 — Greater Lowell senior captain Zach Gaudet (220.28 points) qualified for the Division 2 state meet with his win in diving.

East Boston 86, Randolph 70— Eastie’s medley relay squad of seniors Jonathan Smith, Nick Shea, Anthony Rizzo, and Christopher Villanueva set a school record (2:02:47).

For more highlights, go to bostonglobe.com/schools.