1. Ken Shamrock

Shamrock first left mixed martial arts after the Ultimate Ultimate in 1996, leaving to become a pro wrestler in WWE.  When he returned in 2000 it was clear the sport had passed him by.  Since that time his record is 5W-12L to go along with multiple failed steroid tests.

Probably the best example of how poorly Shamrock faired/is fairing since returning to mixed martial arts some 16 years ago, was his trilogy with Tito Ortiz.  Shamrock dropped every single fight to Ortiz, and was clearly a level or two below Ortiz at that time.

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Ian is a MMA writer based out of Toronto, ON Canada. An avid mixed martial arts enthusiast and passionate fan since he was born, Ian has been writing about mixed martial arts for over 5 years.