Premise: Mike Tyson . He reigned as the undisputed world heavyweight champion and holds the record as the youngest boxer to win a heavyweight title at 20 years , 4 months and 22 days old . He won the WBC title in 1986 after stopping Trevor Berbick in two rounds , and added the WBA and IBF titles after defeating James Smith and Tony Tucker in 1987 . He successfully defended his titles nine times , which included victories over Larry Holmes and Frank Bruno . With his defeat of Bruno , Tyson joined Floyd Patterson , Muhammad Ali , Tim Witherspoon , Evander Holyfield , George Foreman as the only men in boxing history to have regained a heavyweight championship after having lost it .
Hypothesis: Mike Tyson was victorious.
Label: ENTAILMENT