What happened: Every unbeaten team across the NFL was defeated on Sunday, leaving no unblemished records in the league. The losses ensure that no franchise will finish the current regular season without a defeat.

Why it matters: The outcome preserves the historical standing of the 1972 Miami Dolphins, who remain the lone team in NFL history to finish an entire campaign undefeated. Modern league parity continues to protect that mark as every active contender now carries at least one loss.

What to watch: The race for top playoff seeding and home-field advantage across both conferences now shifts to tiebreakers as the regular season enters its second half.