The Wentz Wagon is now a bandwagon. Doug Pederson’s driving. The Eagles’ start-to-finish, 34-7 demolition of the visiting Cardinals left them at 4-1. Carson Wentz played his 21st game, and his finest: 300 yards of pyrotechnics, with four touchdown passes, two of them long and lethal. The legend of LeGarrette Blount grew during a 37-yard run that made the ground tremble. Tight end Zach Ertz continued his march to the Pro Bowl with six more catches for 61 more yards and his second touchdown of the season. The defense, filled and patched and undermanned, muzzled future Hall of Fame receiver Larry Fitzgerald and surrendered its fewest points in 14 games.