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. Kevin McBride Mike Tyson vs. Kevin McBride Mike Tyson vs. Kevin McBride was a professional boxing match contested on June 11, 2005. Although the former heavyweight champion appeared to be ahead on points on the judges' scorecards through six rounds, he failed to answer the bell for the 7th round and was ruled defeated by technical knockout. The fight would prove to be the final one of Tyson's professional career. After being knocked out in the fourth round of his previous fight against Danny Williams, Mike Tyson took a lengthy hiatus as he contemplated whether or not he would continue to fight.