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16-0 vs 17-0 vs 19-0 vs 20-0: Explained

By 16-0 Editorial Updated July 19, 2026

“Perfect NFL season” gets attached to a lot of different numbers — 16-0, 17-0, 19-0, 20-0 — and they don’t all mean the same thing. The confusion comes from two moving parts: the regular season has been different lengths across eras, and “perfect” sometimes means the regular season only and sometimes means everything, playoffs included. Here’s each number, sorted out.

16-0 — a perfect 16-game regular season

From 1978 through 2020, the NFL regular season was 16 games. A perfect one, therefore, was 16-0 — and exactly one team ever reached it: the 2007 New England Patriots. This is the number this game is built around: the classic perfect regular season, no playoffs attached.

It’s the most iconic version because the 16-game schedule covered the entire modern era of televised, heavily documented football, and in all 43 of those seasons only one team ran the table.

17-0 — two different meanings

17-0 is the tricky one, because it means two separate things depending on context:

  • The 1972 Dolphins’ full perfect season. They went 14-0 in the regular season (a 14-game schedule back then) plus 3-0 in the playoffs, for 17-0 total. This is the only completely perfect season in NFL history.
  • A perfect modern regular season. The NFL moved to a 17-game regular season in 2021, so a perfect regular season today would read 17-0 — no playoffs included. No team has done it yet under the 17-game format.

Same number, two entirely different achievements. If someone says “17-0,” it’s worth asking whether they mean the ‘72 Dolphins’ whole season or a hypothetical modern regular season.

19-0 — what 2007 needed

19-0 is the number that haunts New England fans. Under the 16-game schedule, a #1 seed that goes 16-0 needs three more playoff wins for a perfect season: Divisional round, Conference Championship, and Super Bowl (the top seed skips the Wild Card round). That’s 16 + 3 = 19.

The 2007 Patriots got to 18-0 — two playoff wins in — and lost Super Bowl XLII. They were exactly one win short of 19-0, the perfect season under their era’s format.

20-0 — the modern perfect season

Fast-forward to the 17-game era. A perfect season now would be 17 regular-season wins plus three playoff wins for a top seed: 17 + 3 = 20-0. It’s the current-format version of what the ‘72 Dolphins and ‘07 Patriots were chasing, and no team has come close since the schedule expanded.

If the full playoff gauntlet is what you’re after, that’s a different game — our companion site 20-0.online is built entirely around simulating a season plus a real playoff bracket to chase 20-0.

Quick reference

  • 16-0 — perfect 16-game regular season (1978–2020). Done once: 2007 Patriots.
  • 17-0 — either the 1972 Dolphins’ full perfect season (14-0 + 3-0), or a perfect modern 17-game regular season (not yet done).
  • 18-1 — the 2007 Patriots’ actual final record: 16-0, plus two playoff wins, minus the Super Bowl.
  • 19-0 — a perfect season under the 16-game format (16 + 3 playoff wins). Never completed.
  • 20-0 — a perfect season under the 17-game format (17 + 3 playoff wins). Never completed.

This game is the 16-0 version: the pure, classic perfect regular season. To see how rare even that is, read why 16-0 is so rare, or the full story of the only team that did it.

Frequently asked questions

Is 16-0 or 17-0 the perfect regular season?+

It depends on the era. From 1978 to 2020 the regular season was 16 games, so a perfect one was 16-0 (2007 Patriots). Since 2021 it's 17 games, so a perfect regular season today would be 17-0.

Why was the 1972 Dolphins' record 17-0?+

Because that total includes the playoffs. They went 14-0 in a 14-game regular season, then 3-0 in the playoffs, for 17-0 overall — the only fully perfect season in NFL history.

What would 19-0 mean?+

19-0 is what the 2007 Patriots needed for a perfect season: a 16-0 regular season plus three playoff wins (they had a first-round bye). They reached 18-0 before losing the Super Bowl, so 19-0 was one win away.

What is 20-0?+

20-0 is a perfect season under the modern 17-game schedule: 17 regular-season wins plus three playoff wins for a top seed. No team has done it. Our companion game at 20-0.online is built around that version.

Sources

Related guides

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explainer Why Going 16-0 Is So Rare Only one team ever went 16-0. Here's the real reason a perfect 16-game regular season almost never happens — the compounding math of sixteen straight wins. history The 2007 Patriots: The Only 16-0 Regular Season How the 2007 New England Patriots became the only team to go 16-0 in the regular season — the records, the roster, and the Super Bowl that got away. history The Closest Teams to a Perfect 16-0 Season Every team that came within a game of 16-0 — the 15-1 seasons and the undefeated bids that collapsed late, from the '85 Bears to the '15 Panthers. history Has Any NFL Team Ever Gone 16-0? Yes — exactly one. The 2007 New England Patriots are the only team to finish a perfect 16-0 regular season. Here's the full story and what happened next. glossary 16-0 Glossary: Every Term Explained A plain-English glossary of every term in 16-0 and the perfect-season conversation — from spin, reroll, and chemistry to 16-0, 15-1, 18-1, and 17-0. how-to The 16-0 Daily Challenge and Leaderboard How the 16-0 Daily Challenge works: everyone gets the same draft, submits a 16-game record to a shared public leaderboard, and competes on identical footing — no account required.