#6 Anderson Silva
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During his reign as the UFC middleweight champion, Anderson Silva was also a beloved figure among the sport's most ardent fans. From his end, "The Spider" did not have a difficult time to develop a following and his highlight reel performances against elite fighters were strong statements.
It all started to dramatically change when he tested positive for banned substances twice in a span of two years. In one fell swoop, Anderson Silva, a man touted to be the "Greatest of All-Time", was suddenly reduced to a "cheater" and "steroid user" to many MMA fans.
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Silva defended both failed tests by saying they may have been a result of tainted supplements he had taken. Nonetheless, the immediate fighting future of the 42-year-old Silva is not looking good as of the moment.