Walter Ray Williams Jr. would have to have a bad day Friday — or one of those chasing him would have to have an exceptional day — to lose his grip on the top spot at the Senior U.S. Open in Las Vegas. With two eight-game sessions of round-robin match play left before the stepladder finals at the Suncoast Bowling Center, the living legend has a 203-pin lead over fellow Hall of Famer Wayne Webb, PBA reported....