Daria Zhelezniakova

Daria Zhelezniakova, better known as "Iron Lady", brings a 10-3 record into every walk to the cage — and in a division as crowded as women's bantamweight, every single win matters.

He fights at a pace most of the division can't hold — 4.75 strikes landed a minute, every minute. By round three, opponents are usually fighting his fight.

The last fight went to Melissa Croden (Decision - Unanimous) — a setback, and the interesting question is always what a fighter does with one.