O'Fallon slipped past visiting Marion 2-1 Thursday.
Leading the way offensively for O'Fallon were Ben Koenig and Rafa Rollan each with a goal and an assist. Steven Merrill picked up the win in goal for O'Fallon. Junah McPhail scored for Marion.
O'Fallon (9-3) plays Springfield, Illinois at Belleville West on Saturday at 2 p.m. Marion (4-7) plays Edwardsville at Belleville West on Saturday at 4 p.m.