Zach Kozlowski's fifth-inning leadoff home run was all the host Lannon Stonemen needed on Saturday.
The Lannon Stonemen defeated the Cedarburg Mercs in the first round of the Land O' Lakes Grand Championship playoffs, 1-0, thanks to a complete-game effort from pitcher Eric Rohe.
Kozlowski was the only player for Lannon to collect two hits.
Joe Daniels was the losing pitcher for Cedarburg.
New Berlin defeated Waterford in the other LOL game.
On Sunday Lannon travels to Waterford for a 1:30 p.m. game with the Rivermen.