Ottawa (22-0) plays Anderson County (17-6) at 3 p.m. in the first round at the Bicentennial Center.
The other first round matchups have Piper (17-5) playing Andale (20-2); Highland Park (22-0) vs. Winfield (14-9) and Abilene (19-4) vs. Independence (18-5).
The first round winners advance to Friday's state semifinals.
