#4 Ken Shamrock
This entry is a bit of a cheat since Ken Shamrock was already well known for his combat prowess in the UFC.
However, no one expected Ken to be so damn good at 'Rasslin, so he makes this list for sort of the opposite reasons as the rest of the athletes. Capable of executing a sweet Huracanrana and willing to take brutal chair shots from none other than Dwayne "the Rock" Johnson, Shamrock proved his toughness in multiple arenas.
Edited by Nishant Jayaram