Chad Yttri fired an 825 series, and Jon O’Konek, Chris Casson, Bill Leidich and Brian Ruby slammed perfect games to highlight Madison area bowling on Thursday. Yttri’s 825 came in the Spartan Bowl Waubesa Mixed League. O’Konek’s 15th career 300 came in a 780 series in the Waun-A-Bowl Beagles Classic League. Casson’s 300 came in a 766 series in the Prairie Lanes Classic League. Leidich’s 14th career 300 came in a 710 series in the Ten Pin Alley MARBA West...