Callum Smith

Callum Smith, better known as "Mundo", holds the #2 spot at light heavyweight, flying the flag for England — and rankings that high aren't given away, they're taken.

The style is simple and terrifying: 71% of his wins never reach the scorecards. When he touches people, they fall — 22 knockouts and counting.

Most recent outing: a win over Joshua Buatsi via decision (unanimous). Business handled.

At 36, the window is what it is — which tends to make every remaining fight more honest, and more dangerous.