Shayna Ng of Sinagpore averaged 227.5 to lead the 2018 PWBA Las Vegas Open through Friday’s two rounds of qualifying at South Point in Las Vegas. Ng totaled 3,640 on games of 208, 219, 203, 268, 247, 246, 207 and 289 for 1,887 in the first round and 188, 180, 206, 225, 237, 257, 256 and 204 for 1,753 in the second round. Diana Zavjalova of Latvia was second at 3,619, followed by reigning PWBA Player of the Player Liz Johnson with 3,585, fellow Hall of Famer Leanne Hulsenberg at 3,575...