Probably around 10. but turned professional at 18.
Muhammad Ali was 10 years old when he started boxing, and because he practised a lot he was professional at the age of 18.
the answer is 17. rocky balboa started boxing at the age of 17
10 year old
16
Muhammad Ali got his start in boxing when he was a 12 year old boy. He got into boxing because his bike was stolen and when he reported it to a police officer, the officer encouraged him to learn to box.
It is unknown who the oldest person is to start boxing. Many boxers have started boxing after the age of 30, which is considered 'old' to start boxing.
Laila Ali was 18 when she began boxing in 1996 (born 1977). Her first professional fight was in 1999.
9 years old.
28 years old
He turned "68" on Jan. 17 of 2010. Many more and happy years for boxing great, ex-heavyweight king, Ali!
He actually wasn't thinking about that because he started boxing at a very young age, 12 years old, so i don't think he was thinking about occupation or job he wanted to be.