It is Mike Tyson when he was fighting with Trevor Berbick
He became the youngest heavyweight champion in history.
Yulla Habub
Vitali Klitschko of the Ukraine has been the World Boxing Council heavyweight champion since October 2008.
The current F1 world champion is Sebastian Vettel from Germany. He is the youngest ever world champion.
Mike Tyson hold the record for the youngest heavyweight champion of the world at 20 years, 4 months and 22 days old
Wilfred Benitez is the youngest (male) world champion in boxing history, capturing the WBA junior welterweight title at the age of 17 years and 5 months with a split decision over Antonio Cervantes. He went on to win the WBC welterweight title as well as the WBC light middleweight title. = =
wilfredo benitez of puerto rico won a title at the ripe old age of 17.
David Haye, he took it from Nikolay Valuev in November, 2009.
joe louis
boxing
BOXING
Muhammad Ali was famous for being a Boxer and was a world boxing champion.
Brock Edward Lesnar three-time WWE Champion, is the youngest WWE Champion in history age 25.He Became the youngest WWE champion by defeating Dwayne "The Rock" Johnson at Summerslam 2002Randy Orton is the youngest world heavyweight champion age 24