Brandon McManus missed a 64-yard kick with 20 seconds left as the Seahawks knocked off the Broncos 17-16 on Monday night in Seattle.  Geno Smith completed 23-28 passes for 195 yards and two touchdowns, one of which came on Seattle's opening drive.  The Seahawks' defense held up in the red zone, forcing two fumbles at the one-yard line.  Russell Wilson threw for 340 yards and a touchdown in his Denver debut.  Denver dropped to oh-and-1, while Seattle improved to 1-0