my little brother who is 14 is one of the amateur fighters

to those who have no experience in martial arts, there is a long way from newby to a fighter. Many people who start doing it won't make it this far in 10 years. My brother made it in 3 years, he started with 12 and now he's an amateur boxer/kickboxer. He made it this fast because he participated 2 different training sessions, boxing and kickboxing, 6 days a week, as you can imagine this had to be really hard for a 12-year-old. He is 65kg, which is amazing, since his bodyfat percentage is only 7%, that means that he will be able to particate heavyweight, maybe even super heavyweight championchips one day.
next month is his first official fight, i will be there as one of his coaches.