Now that the NFL season has moved into Week 5, the DVOA statistics at Football Outsiders include opponent adjustments for the first time this season. Without opponent adjustments, the Ravens would have the No. 1 defense in the league, but when adjusting for opponent, they rank second to Buffalo. Playing the Falcons in Atlanta is tougher than playing the two Ohio offenses, and the Ravens also get dinged extra hard for a terrible performance in London against Jacksonville's middling offense.
Buffalo has not been an historically strong defense to start the season, but you'll still want to consider