Griffin Sleyko struck out seven in a complete-game five-hitter, and Mike Polubinski had two run-scoring hits as Oswego East beat Waubonsie Valley 5-1 in the Class 4A Waubonsie Valley Regional final for the program's first-ever regional title.

Gallery

Here are Sean King's photos from Saturday's Class 4A Waubonsie Valley Regional final between Oswego East and Waubonsie Valley.

Michigan recruit Ben Oosterbaan scattered eight hits and struck out seven – the last one, with the tying runs on base – to power Hinsdale Central past Yorkville 2-0 in a duel between future Big Ten pitchers in the Class 4A Bolingbrook Regional semifinal.