Amber Gehrke, a 22-year-old from the Twin Cities suburb of Hopkins, Minn., won the Plastic Ball Classic at Badger Bowl on Friday. The third annual handicap tourney at Badger Bowl drew 38 bowlers who averaged a collective 184 competing on a light oil house shot of the type used back in the days of plastic — polyester actually is the correct term — equipment being used for all shots, not just spares....