Intimidation is a key factor in sports. In this case though, for sports entertainment purposes, it's an enormous factor.
Some of the big men in wrestling have made their careers off of being an intimidating figure, namely the man pictured above, who needs no introduction. The Undertaker's very presence is frightening in many ways.
Throughout the history of professional wrestling, there have been many intimidating figures. Not only from WWE but also WCW and ECW, the company that started out from a little South Philadelphia bingo hall. In and of itself, ECW was based on intimidation.
Many of the intimidating athletes you're about to see were big in stature, others not so much. But they all had one thing in common. They all made their opponents shake in their boots.
Here is a list of some of the most intimidating figures in the history of professional wrestling.