NCAA Men's Division I Basketball Championship upsets

An upset is a victory by an underdog team. In the context of the NCAA Men's Division I Basketball Championship, a single-elimination tournament, this generally constitutes a higher seeded team defeating a lower-seeded (and thus higher-ranked) team; a widely recognized upset is one performed by a team ranked substantially lower than its opponent.

This is the list of victories by teams seeded 11 or higher in the tournament since it expanded to 64 teams in 1985; as these high-seeded teams were automatically paired against lower-seeded teams at the start of the tournament, their opening victories are almost always considered upsets. Most victories by these teams in later rounds were usually against better seeded opponents as well.

This round was called the First Round until 2011, when the introduction of the First Four caused the round to be renamed the Second Round. As of the 2016 tournament, it has returned to being called the First Round. There have been ten wins by double-digit seeds in 2016, which is the most in tournament history. In 2001 and 2012, there were nine upsets during First Round play.

Excluding the play-in games, a 16-seed has never won a game in the men's tournament. There have been fifteen 1-seed vs. 16-seed games decided by single digits, the most recent occurring in 2014 when Arizona defeated Weber State 68–59, only one year after Gonzaga narrowly defeated Southern 64–58 in 2013. Sixteenth-seeded Murray State took top seeded Michigan State to overtime in 1990, but eventually lost 75–71. Two 16-seeds have come within two points of upsetting a #1 seed, both in 1989. In the East Regional, Georgetown hung on to win 50–49 against a Princeton squad who were 23 point underdogs. Princeton had the opportunity to win the game with the last shot, but Alonzo Mourning blocked the last two attempts to secure the victory. In the Southeast Regional, Oklahoma fought back from a 17-point first-half deficit to take the lead over East Tennessee State with 1:21 remaining. ETSU also had a chance at a last-second win, but Alvin West's shot from halfcourt was deflected and Oklahoma defeated ETSU 72–71. In 1996, Western Carolina missed a three-pointer to win and a two-pointer to tie in the final seconds, losing 73–71 to Purdue. In 2014, Coastal Carolina was tied with Virginia with eight minutes remaining in the second half before Virginia pulled away for a 71–59 win.

There have been eight 15 seeds that have defeated 2 seeds (6.06%)in the first round:

There have been twenty-one 14 seeds that have defeated 3 seeds (15.9%) in the first round:

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