The amateur restrictions in the Olympics have been mostly phased out. According to https://en.wikipedia.org/wiki/Amateur_sports#Olympics https://en.wikipedia.or

The amateur restrictions in the Olympics have been mostly phased out. According to https://en.wikipedia.org/wiki/Amateur_sports#Olympics https://en.wikipedia.org/wiki/Amateur_sports#Olympics: Olympic regulations regarding amateur status of athletes were eventually abandoned in the 1990s with the exception of wrestling, where the rules for participation still require amateur status rather than professional status for the safety of the participants. For the upcoming 2016 Summer Olympics professionals will be allowed to compete in boxing.