Mike Tyson vs. Michael Spinks the sport a month later. The Tyson fight was the only loss of his professional career. Tyson also spoke of retiring, hinting that "this may be my last fight." The win over Spinks has been described as the pinnacle of Tyson's boxing career. It was also his last fight under longtime trainer Kevin Rooney, who was dismissed by Tyson in December. Tyson made two more successful title defences before losing to James 'Buster' Douglas in a major upset in 1990. He continued fighting until 2005, but was unable to replicate his earlier achievements. Tyson and Spinks have both been inducted
Mike Tyson vs. Michael Spinks and then successfully defended his title against Steffen Tangstad. Instead of defending his IBF title against top contender Tony Tucker, Spinks elected to take a more lucrative fight with former contender Gerry Cooney, who had fought three times in five years, in June 1987. The IBF responded by stripping Spinks of the title, but he was still in possession of the lineal and "Ring" titles and was considered by many to still be the rightful champion. Mike Tyson turned professional in 1985 and won his first 19 fights by knockout, quickly garnering media attention and establishing an "aura of invincibility".