Mike DiLiello won by decision at 125 pounds as East Islip handed North Babylon its first League III loss, 36-27, Friday.
DiLiello's 5-0 decision over Tom Bennett gave East Islip (5-0) a 36-21 lead over North Babylon (4-1).
David Dellavecchia also won a pivotal match at 112 pounds, a 4-0 victory over Nick Domnisch for East Islip, which clinched at least a tie for the League III title.
The Redmen are going for their second straight outright league title and their fifth in six years.
Valley Stream North 43, Jericho 24: Cyle Sicurella won by a technical fall over Paul Jaggi in 4:20 at 130 pounds for Valley Stream North in the NIT semifinal.
Newfield 56, Centereach 15: Colton Fusaro pinned Vincenzo Carusso in 1:39 at 189 pounds to lead Newfield in League III.
Connetquot 51, Lindenhurst 12: Mike Cella decisioned Kyle Delgado, 9-3, at 145 pounds for Connetquot (5-0) in League II.
Central Islip 28, Sachem North 27: In the final match of the night, senior captain Joshua Duperoy won a 4-0 decision over Tyler Itzkowitz to clinch the win for Central Islip (4-1) in League II.
Sayville 54, Harborfields 18: Joseph Haas scored a major decision over Jay Mazzola, 8-0, at 145 pounds for Sayville (4-1) in League V.
Glenn 55, Mount Sinai 12: Matt Gannon earned a 2-0 decision over Eric Kogel at 135 for Glenn (6-0) in League VI.