Khaos Williams

Khaos Williams made an unforgettable first impression in the UFC, scoring a pair of blink-and-you'll-miss-it knockouts that immediately marked him as one of welterweight's most dangerous punchers. The power is real and it's terrifying: when Williams connects clean, fights are over in seconds.

The rest of his career has played out around that single defining trait. More technical, durable welterweights like Randy Brown have shown that there's more to him to develop, and the result has been a feast-or-famine path that sits at 15-5.

But for fans, the appeal is obvious and never fades. Every time Williams steps in there's the genuine threat of a highlight-reel first-round finish, the kind of one-shot danger that makes you afraid to look away.