7. Wilfredo Benitez
Achievements as a Teen: Wilfredo "The Radar" Benitez became the youngest world champion in boxing history at the age of 17. On March 6, 1976, with his high school classmates in attendance, he faced WBA Light Welterweight champion Antonio Cervantes. Cervantes was 30 years old with a record of 74-9-3 with 35 KO's and 10 title defenses. Did this look fair to anyone on paper? Anyway, Benitez took the champ 15 rounds and earned a split decision win.
Career Recap: After becoming the youngest champion in boxing history at the age of 17, Wilfredo Benitez went on to win world championships in three separate weight divisions. He finished with a record of 53-8-1 and became a member of the International Boxing Hall of Fame in 1996. At 22, Benitez became the youngest three-time world champion in boxing history by knocking out WBC World Super Welterweight Champion Maurice Hope in an epic clash that lasted 12 rounds. Sadly, the years after retirement have been a lot harsher on the champ than the ones he spent in the ring.