#4 Ken Shamrock
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This entry is a bit of a cheat since Ken Shamrock was already well known for his combat prowess in the UFC.
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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.
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Edited by Nishant Jayaram