Senior striker Felix De Bona scored the only goal of the game two minutes into the second half, and Somerville overcame a stifling St. John’s Prep defense to win the Division 1 North title, 1-0, at Manning Field in Lynn on Sunday.

De Bona collected a pass down the wing from Julian Murphy, turned on two defenders, and ripped a shot from the right side of the box that Eagles keeper Ben Alpern could not contend with.