Posted By:
MarkI don't have time to look it up, but I think a tiny college (Chaminade?) beat Ralph Sampson and Virginia when they were #1, and considered invincible. At the time, I recall this being considered an impossible occurance.
It was a regular season game, so it does not carry the weight of the Miracle Mets, US Hockey Team, Duke or Ouimet... but it was perhaps even a more unlikely upset.