March Madness Day One Leaves Only 0.0938% of Brackets Perfect

Historic upsets, including McNeese State’s win over Clemson, have drastically reduced the pool of perfect brackets in the 2025 NCAA tournament.

The 2025 NCAA March Madness tournament began with over 34 million bracket submissions, but only 0.0938% remain perfect after the first day.
McNeese State’s 69-67 upset of Clemson was a major factor in eliminating a significant portion of brackets early in the day.
Other key results, including wins by BYU, Gonzaga, and Arkansas, further reduced the number of perfect brackets to a fraction of a percent.
Duke University is currently favored to win the tournament, according to betting odds from DraftKings.
The odds of creating a perfect bracket are astronomically low—1 in 9.22 quintillion with random picks or 1 in 120.2 billion with basketball knowledge.