It was a day for milestones in Winchester.
Senior Megan Hennessey broke the Sachems’ career scoring record with a four-goal, four-assist performance, and the 17-5 lacrosse victory over Belmont marked coach Suzanne Ontso’s 300th win.
Hennessey passed Lauren Sullivan for the points mark with 333, and her 117 assists pushes her ahead of Katie Brooks for the program’s all-time lead.
Brooks graduated in 2004 and went on to play at the University of North Carolina and then with the Canadian national team. Hennessey is second in career goals behind former teammate Sullivan, who graduated in 2010 and now plays at Notre Dame.
Ontso is in her 19th season as varsity coach at Winchester and says that Hennessey “could very well be our best player ever.
“Finishing with four goals and four assists today is the perfect way to describe her as a player — balanced.”
Hennessey didn’t realize she had claimed the record until hours after the game because Ontso kept the milestones secret in an effort to minimize the pressure.
“I’m really excited,” Hennessey said. “It’s a real honor to be up there with Katie and Lauren.”
Hennessey is also an All-Scholastic soccer player, but has committed to play lacrosse for Harvard.
“Lacrosse is my passion,’’ she said. “I can’t wait to play at the next level.”
Dedham 9, Brookline 5 — Senior captain Jodie Munchbach netted five goals to power the Marauders past the Warriors.
Catholic Memorial 17, Malden Catholic 6 — Tyler Bogart (six goals, two assists) and Frank Cosolito (four goals, two assists) led the Knights.
Garden City 10, Duxbury 1 — Junior Tanner Williams scored the Green Dragons’ only goal in a loss to the New York power.
Arlington 6, Lexington 5 — Seniors Sam Cleveland and Matt Katilian each scored two goals for the Spy Ponders.
Cohasset 10, Tantasqua 5 — Skippers sophomore Cole Kissick finished with four goals and two assists to top the host Warriors (0-3).
Rivers 5, Milton Academy 4 — Senior Jake Willsey clocked a triple and a double on his way to a three-RBI day for Rivers (1-0).
Bishop Feehan 6, Durfee 5 — Alex Benevides went 2 for 4 for the Hilltoppers in a losing effort.
Walpole 8, Mansfield 5 — Junior Nick Cordopatri pitched 2⅓ innings of scoreless relief to pick up the win. Mike Rando collected three hits and scored three runs for the Rebels.
Lexington 6, Lowell 5 — Matt Lacey pitched 3⅓ scoreless innings in relief for the Minutemen. Chris Ruocco hit the winning single.
Medford 3, Winchester 2 — The Mustangs won their opener on a bases-loaded walk to senior Sean Doncaster. John Lavoie earned the win in relief.
Case 16, New Bedford 4 — Leslie Denis struck out 12 and Kelsey Pacheco went 3 for 3 for the Cardinals.
For more scores, go to Boston.com/schools