How Often Does a 16 Seed Beat a 1 Seed?

Learn the full history of the 1 vs 16 seed matchup, and what it means for your bracket strategy.

by Spencer Limbach - Feb 25, 2026

When March Madness arrives each year, basketball fans eagerly fill out their brackets, typically penciling in all four 1 seeds to win their opening-round games without a second thought. And historically, that’s been the right call. But there have been a few instances where David has beaten Goliath. Below, we’ll run through how many 16 seeds have beaten 1 seeds and the historical context of this first-round matchup.

How Many 16 Seeds Have Beaten a 1 Seed?

It has happened only twice in NCAA Tournament history. 

That’s right, since full seeding began in 1979, No. 1 seeds have dominated with a 154-2 record against 16 seeds, good for a .987 winning percentage.

The two monumental upsets occurred relatively recently:

• 2018: UMBC (University of Maryland, Baltimore County) shocked the basketball world by defeating Virginia 74-54, becoming the first 16 seed to topple a 1 seed in NCAA tournament history.
• 2023: Fairleigh Dickinson stunned Purdue 63-58, marking the second time a 16 seed advanced past the opening round.

Before UMBC broke through in 2018, the 1 seeds had gone a perfect 135-0 against 16 seeds since the tournament expanded to 64 teams in 1985.

What’s the Farthest a 16 Seed Has Gone in the NCAA Tournament?

No 16 seed has made it past the Round of 32.

Neither of the two victorious 16 seeds (mentioned above) managed to win their second-round games.

• After their historic upset over Virginia, UMBC lost to 9-seed Kansas State 50-43 in the second round.
• Similarly, Fairleigh Dickinson fell to 9-seed Florida Atlantic 78-70 following their victory against Purdue.

The difficulty of stringing together multiple wins as a 16-seed highlights how challenging the tournament path becomes. These teams typically face a quality No. 8 or No. 9 seed in the second round. The talent gap and handling emotions after such a historic upset have proven too much to overcome.

Related: Check out our article on the lowest seed to win March Madness.

What Does This Mean For Your Bracket?

While historical trends, such as the 1 vs 16 matchup data, are interesting, they don’t tell the whole story.

You need to be careful when applying this information to your bracket strategy.

Our data shows that the general public follows NCAA tournament trends to a fault. For example, since 2010, the public has picked 23% of No. 6 seeds to advance to the Sweet 16, even though only 15% have done so on average. This is just one example of an inefficiency you can exploit.

The Better (Data-Driven) Approach

The better approach is to find leverage in your bracket based on these public biases. Simply following historical trends without considering how others in your pool are picking will limit your chances of winning. If you want an edge, start with what defines the best NCAA bracket picks.

Even with the 1 vs. 16 matchups, understanding which 1 seeds might be more vulnerable than others—and whether that vulnerability is enough to justify the risk (whether in the first round, second round, or Sweet 16)—requires deeper analysis than just looking at historical percentages.

That’s where our NCAA Bracket Picks Optimizer comes in.

Level Up Your Bracket Picks with PoolGenius

At PoolGenius, we show you exactly how to find leverage in your bracket by providing public pick data from several sources and comparing that with the ACTUAL odds a team has to advance.

This helps you identify perfect opportunities to go against the public and gain an edge in your pool.

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Our platform optimizes your picks based on sophisticated algorithms—not cherry-picked trends that inevitably break. The user-friendly interface delivers championship-level bracket picks, making it easy to leverage top-tier data—no PhD in statistics required.

Win your bracket pool this year by leveraging data (not opinions) with PoolGenius’s customized NCAA bracket picks.