Mike Tyson was 20 Floyd Patterson was 21 Muhammad Ali was 22
Trevor Berbick On November 22, 1986, Tyson was given his first title fight against Trevor Berbick for the World Boxing Council (WBC) heavyweight championship. Tyson won the title by second round TKO, and at the age of 20 years and 4 months became the youngest heavyweight champion in history
If referring to the Heavyweight Champion of the world Mike Tyson, then, no he is not.
Tyson, but arguments could be made for Riddick Bowe too (he turned pro in 1989, as did lewis).
Muhammond aliMike tyson
Mike Tyson wold win because Muhammad Ali has Parkinson's.
Mike Tyson hold the record for the youngest heavyweight champion of the world at 20 years, 4 months and 22 days old
mike Tyson aged 20.
Mike Tyson
Mike Tyson was the youngest man to ever win a heavyweight boxing title but Floyd Patterson is the youngest ever undisputed world champion, though Patterson never fought in the multi commission ruled era of the WBC, WBA, & IBF.
Tyson was an Amateur Heavyweight for several years before having his 1st pro bout as a heavyweight against Hector Mercedes on March 6, 1985, with Tyson winning by a 1st round knockout. (1:50).
Muhammad Ali would beat Mike Tyson.