Undefeated Trio Separates, But Bills Own the League's Scariest Offense

Five weeks in, and we've got three unbeatens—but don't lump them together. San Francisco sits atop the throne at 5-0 with a 30.8 offensive rating that screams legitimacy. The Niners are scoring, they're winning, and there's zero fluff in that résumé. Minnesota matches the record at 5-0, but that 21.5 offensive rating…