The Ravens needed the Patriots’ help last week against the Dolphins. Didn’t get it. They’ll call on New England (9-4) again Sunday, and the implications of a win would be significant for both parties. With a Ravens win and a Steelers loss, the Ravens would climb into first place in the AFC North for the first time since Week 6. New England, meanwhile, would be one step closer to possibly catching the Chiefs for the AFC’s No. 1 seed. As for the Steelers (7-5-1), well, you don’t want to pin your hopes on ending a four-game losing streak by beating the Saints in New Orleans.