Any time a fighter as accomplished as Vitor Belfort steps in the Octagon, there is always something factual of note to bring up.

In the case of "The Phenom," his name in the sport for more than a decade has been built around being one of the most dangerous first-round fighters in not just the Ultimate Fighting Championship (UFC), but in all of mixed martial arts (MMA).

The Brazilian proved once again exactly why he has that stigma attached to him on Saturday night (May 18, 2013) with an absolutely devastating first-round head kick knockout of former Strikeforce middleweight champion Luke Rockhold in the UFC on FX 8 main event.

The incredible win improved Belfort to 5-1 since dropping to 185-pounds in 2008 and further extended his record for most first-round finishes in UFC history, which only adds to the Hall-of-Fame worthy resume The Brazilian has put together.

Belfort's ability to finish opponents in the first round time after time is unlike anyone else in the sport -- that's a fact.

But there were also plenty of other facts to come out of UFC on FX 8: "Belfort vs. Rockhold," which took place at Arena Jaragua in Jaragua do Sul, Brazil on May 18, 2013.

Check out all 25 of them below:

That's a wrap for this set of UFC facts.

Did you learn anything new/interesting? Do any of the facts change your perspective on Saturday's fights?

Let us know below!

(Some info courtesy of UFC, Fight Metric and BestFightOdds)

For more news and notes on UFC on FX 8: "Belfort vs. Rockhold," be sure to visit our complete event archive here.