Professional fighters move in two directions.
Some fighters—the most successful ones—constantly improve and regularly add weapons to their arsenals.
Dan Hardy can wrestle a little now, and Pat Barry is no longer helpless off his back. These two fighters illustrate one end of the spectrum.
On the other end are fighters who deteriorate and become shells of their former selves.
Because of this, some fighters' past victories look incredibly unlikely in retrospect, and a rematch would certainly not go the same way.
To honor this fact, let us take a look back through recent UFC history and handpick some matchups that crowned an unlikely victor.