The 25 Most Hated Fighters in MMA History | News, Scores, Highlights, Stats, and Rumors

Former champion Ken Shamrock is a legend of the sport for his skill in the cage as well as his less than likable behavior outside of it.

Shamrock had an unsuccessful time as a coach on the Ultimate Fighter and lost the respect of many fans after running his mouth and losing to Tito Ortiz twice.

He also got caught using steroids and was sidelined for a year.  That, coupled with other bad decisions, such as a missed opportunity to fight his estranged brother Frank Shamrock, has made him one of the more hated fighters in the sports history.