One of the key choices in filling out a March Madness bracket is deciding when to choose a loss for each of the four No. 1 seeds.
Bracketologists who predict a loss too early could get burned if the No. 1 seed in question goes on a deep run.
On the other hand, a minimum of three No. 1 seeds will eventually lose. So, of course, college basketball fans have to at least consider the possibility that a No. 1 seed might go down ahead of the Final Four, regardless of what the NCAA basketball odds might say.
To aid this annual analysis, I have compiled the data on how often No. 1 seeds suffer early losses in the first week of the NCAA men’s basketball tournament. Hopefully, this information helps you make informed decisions when filling out your bracket in 2026.
How Often Does a No. 1 Seed Miss the Sweet 16?
Since the 2010 NCAA Tournament, about 80% of No. 1 seeds fail to make the Sweet 16. That’s roughly one of four every year.
To be mathematically optimal, you should consider picking against one No. 1 seed in your bracket’s Round of 32 – the second round.
NCAA Tournament Analysis for No. 1 Seeds
In seven of the 10 seasons from 2000-09, all four No. 1 seeds won their first two tournament games and made it to their expected Sweet 16 locations.
The decade was capped by the 2009 NCAA Tournament, where all four No. 1 seeds made it all the way to the Final Four – something that had never happened since the tournament expanded to six rounds.
It was a mostly chalky decade in a mostly chalky sport.
But somewhere around 2010, No. 1 seeds became slightly less predictable. No. 1 seeds began losing with increasing regularity in the early tournament games. Whereas the 2000s had seven years where all four No. 1 seeds made it through the first week unscathed, the 2010s had only three years where this occurred.
And where the 2009 bracket capped a chalky decade with a historic Final Four full of No. 1 seeds, the 2018 tournament stunned viewers with the first-ever loss of a No. 1 seed in the Round of 64. Virginia’s loss to UMBC still echoes as one of the biggest upsets in March Madness history.
Something has happened in the last 15 years that has markedly impacted the consistency of No. 1 seeds in the NCAA Tournament. It could be top teams’ increased reliance on freshman stars; it could be something else entirely.
If so, it’s worth noting that college basketball is having something of a veteran resurgence. It’s once again en vogue to have an older, experienced team.
Perhaps not coincidentally, No. 1 seeds have gone 8-for-8 in reaching the Sweet 16 over the last two seasons.
It’s the first time all four No. 1 seeds have made it to the Sweet 16 in consecutive seasons since 2008-09.
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