Support our high school sports coverage by becoming a digital subscriber. Subscribe now Newport Harbor’s boys water polo team tightened the grip on its Back Bay rivalry with Corona del Mar by collecting a 16-9 victory Wednesday in the Sunset League. In posting a 16th consecutive win in the long-running Battle of the Bay series, the top-ranked Sailors (13-0, 4-0) received four goals from Kai Kaneko and Lucca Van Der Woude and three apiece from Connor Ohl and Geoffrey Slutzky. Slutzky, an emerging junior center, drew five exclusions and two penalties while left-hander Mason Netzer added four assists. USC committed...