Mike Tyson vs. Brian Nielsen Originally, Tyson was rewarded with a technical knockout victory, but it was later changed to a no-contest in January 2001 after a post-fight drug test revealed that Tyson had tested positive for marijuana. Just days before Tyson's positive test became known to the public, he was also issued a three-month suspension by the State of Michigan, which the Nevada Athletic Commission agreed to uphold, though the suspension had little effect on Tyson's boxing schedule as he had already announced his intentions to take those three months off. After serving the suspension, Tyson's next fight was initially going to be against
Mike Tyson vs. Danny Williams the desire to fight and announced his retirement from boxing. Willams, meanwhile, was able to extend his victory over Tyson into a world title fight with WBC heavyweight champion Vitali Klitschko. Williams met Klitschko on December 11, 2004. Williams was dominated for the entire fight. Klitschko knocked down Williams four times through eight rounds, before the referee waved off the fight following the fourth and final knock-down at 1:26 of the eighth round. Mike Tyson vs. Danny Williams Mike Tyson vs. Danny Williams, billed as "Return for Revenge", was a professional boxing match contested on July 30, 2004. Although former