
Chasing a Perfect Bracket: How Long Do Perfect March Madness Runs Really Last
The longest verifiable perfect NCAA bracket is 49 games (Gregg Nigl, 2019). Since then, public tracking shows perfect runs are extraordinarily rare and typically end in the early rounds, with recent years (2025–2026) busting by the second round (games 43–44). The piece also notes astronomical odds for a flawless bracket—up to about 1 in 9.2 quintillion for a 63-game bracket under a 50-50 assumption and around 1 in 28 billion when accounting for basketball knowledge—despite millions of brackets tracked online each tournament.













