When the NCAA Tournament expanded to 64 teams in 1985, upsets became the fuel that helped the tourney grow.
Villanova made an improbable run to the championship as No. 8 seed in the first year of the 64-team tournament. Dick Tarrant and Richmond were the kings of the first round upsets. They won first-round games as No. 12, 13, 14, and 15 seeds.
Since then, the NCAA tournament has become a March ritual. Virtually everyone has a office pool, and other than the Super Bowl, the tournament has the largest following in American sports.
Over the years, the tournament's first round has been a wild ride. Let's break down the 12 biggest upsets.