The youngest lightweight boxing champion was Muhamid Ali. He was considered a lightweight player at 205 lbs at age 17 and he was champion.
Mike Tyson
terry terry
Boom Boom Mancini
mike tyson
It is Mike Tyson when he was fighting with Trevor Berbick He became the youngest heavyweight champion in history.
mike Tyson aged 20.
wilfredo benitez
prince naseem hamed
Yulla Habub
Iron Mike Tyson was the youngest heavy weight champion ever at 20 years old.
Floyd Patterson
Mike Tyson 20 years old.