Melquizael Costa capped off a tremendous 2025 with his fourth win of the year but none better than the vicious head kick knockout he delivered at UFC Vegas 112.

The Strong Style Fight Team cornerstone punched out Fabricio Werdum and captured the undisputed heavyweight title in the first round of their UFC 198 headliner on May 14, 2016.

Reigning UFC light heavyweight champion Alex Pereira brutally knocked out a sparring partner, and fight fans are not impressed.

Check out the super-slow motion video highlights from UFC 323 in Las Vegas, which featured two title fights at the top of the card.

The first preliminary fight on the UFC 323 card ended in spectacular fashion. Featherweights Mairon Santos (17-1) and Muhammad Naimov (13-4) shared the Octagon inside T-Mobile Arena in Las Vegas. Santos was getting the better of Naimov in the standup, and it led to a one-punch knockout in the third round.

Undefeated UFC lightweight champion Ilia Topuria explained his absence from the UFC 324 title bout on Monday, alleging he's addressing an extortion attempt and will return to the cage at the appropriate time.

Melquizael Costa closed out a career year in electric fashion at UFC Vegas 112 with a devastating head kick knockout against Morgan Charriere.

UFC Featherweight Champion Alexander Volkanovski has addressed recent speculation that he plans to retire following his next fight.

Middleweight contender Jared Cannonier famously started his UFC career as a heavyweight, eventually losing over 100 pounds to compete in his current weight class. Others, such as rising heavyweight Martin Buday,

Go inside the numbers of UFC Vegas 112, the final event of the year, where a couple of historic knockouts happened to close the show.