Aljamain Sterling

Aljamain Sterling, better known as "Funk Master", holds the #4 spot at featherweight, flying the flag for the United States — and rankings that high aren't given away, they're taken.

The game is built on grappling: 2.5 takedowns per 15 minutes, and opponents spend rounds defending instead of fighting. 8 submission wins say what happens when the defense slips.

Most recent outing: a win over Youssef Zalal 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.