Midway through Saturday night’s first round of match play at the Rolltech PBA World Championship, a PBA Tour ball rep for one of the major companies walked by a group of observers and made a prediction. “He’s going to lead by 300 again — 300!” the rep said, flashing three fingers for emphasis. At that point, “He” was in second. By the end of Saturday night’s eight games, “He” was in first by 172 pins, and with lefties making...