John Szczerbinski maintained the men’s lead and Diandra Asbaty grabbed the women’s lead after Sunday’s fourth round of the 2013 Team USA Trials, the United States Bowling Congress reported. Casey Shephard led the men’s fourth round at Sunset Station’s Strike Zone bowling center on the 38-foot Atlanta pattern with 1,466 for six games (244.3 average), 48 pins more than Wesley Low. Szczerbinski was third for the round with 1,388 Asbaty led the women’s fourth...