Never in the post-merger era has the NFL had four unbeaten teams this deep into a season. One of those, the Denver Broncos, will remain spotless into November because they are off this weekend. The Colts almost have another bye — they visit winless St. Louis. New Orleans and Minnesota have much bigger challenges, with the Vikings headed for Heinz Field to play the surging Steelers, and the Saints…

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Saints try to stay unbeaten at Miami (AP)