Brooklyn Buchanan is one day from an unprecedented accomplishment: leading both the girls and boys at the Teen Masters. Heading to Saturday’s final day of the 2021 Teen Masters, Buchanan leads defending girls champion Caroline Thesier by 512 pins, and she has knocked down 69 more pins than boys’ leader John Nunn in totals excluding bonus pins. Nunn, 16, won five of his six matches Friday night at Thunderbowl Lanes in Allen Park, Michigan and closed with games 235 and 257 to finish...