Ryan Magee fired a 37, and Mundelein's boys golf team shot a 160 in edging host Warren (169) at Bittersweet Golf Club on Thursday.
Mundelein also counted John Lentz's 38, Tyler White's 42 and Brett Parola's 43.
Warren was led by 42s from Orlando Avila, Matt Moran and Luke Maan de Kok.
Lake Zurich d. Zion-Benton: At Lake Barrington Shores Country Club, the host Bears (171) beat the visiting Zee-Bees (183), as Matt Gadomski earned medalist honors with a 37.
McHenry d. Grayslake North: At Renwood, the Warriors posted a 153 to beat the Knights (173).
Jon Cesario paced Grayslake North with a 40.
Lake Forest d. Antioch: On Wednesday at Lake Bluff Golf Club, Sam Brush's 35 led the host Scouts (154) to the North Suburban Conference win.
Antioch (177) was led by Dillon Kreutzer's 42.