NEW ORLEANS — Josh Allen passed for 260 yards and four touchdowns, Buffalo’s defence stifled New Orleans’ short-handed offence and the Bills rolled to a 31-6 victory Thursday night that sent the injury-ravaged Saints to their fourth straight loss. Tight end Dawson Knox caught two TD passes, giving him a franchise-best seven TDs in a single season by a tight end. His second score gave the Bills (7-4) a 24-0 lead. Stefon Diggs caught seven passes for 74 yards and a touchdown, and running back Matt Breida turned a short pass into a 23-yard score. The Saints (5-6), playing without dynamic running back Alvin Kamara for a third straight game, were shut out for three quarters. They finally scored on Trevor Siemian’s 11-yard pass to tight end Nick Vannett on the first play of the fourth. Buffalo outgained New Orleans 361-190 and the Bills possessed the ball for 34:38 to the Saints’ 25:01. The game illustrated how limited the Saints’ offence has become, in part because of injuries to Kam...