As a sport, the UFC is harder to follow than others in terms of understanding the relationship of old and new fights and unpacking how the sport evolved. You can tell many new fans miss context and have a skewed perspective.Yeah, I've often listed it as one of the greatest upsets in UFC history but not many current fans know about it.
It was a bit later, but another epic upset was when BJ first moved up and beat an invincible looking (at the time) WW champ Hughes. Few saw that one coming, and those kinds of accomplishments get missed when you only looked at fight finder and read his 16-14 record years later.